Calibration of CFT Detector

21 November, 08, jadzia warchol, ext. 8341, phone 357-4232

1

Calibration of CFT Detector

Download trigger (in taker, under Modify: Free Trigger & Change

Trigger) each time you start calibration run.

After calibration you will return CFT crates to global run and check histograms from ft_examine. Do also ‘Checklist Between Stores’ to save histograms. Read hit map analysis in the Checklist. You should have zero of hot and cold modules and tripts.

Also re-start cft_gui at Tracking station


2

Calibration of CFT Detectorhttp://d0server1.fnal.gov/users/warchol/

Content Page

Calibration in brief………………………………………………………………….3 Calibration of discriminators …………………………………………...…………9

Aligning pedestals ……………………………………………………………… 27

Calibration of Time ………………………………………………………………..28

Calibration of Analogue Thresholds …………………………………..……...31

Patching when calibration constants do not make to database……...……….50

Using Old Calibration Run ………………………………………………………. 55

Preparing for global run…………………………………………………………...56

Power cycling and insertion of new AFEII boards……..……………………….57

Looking at data……………………………………………………………………. 60

Transferring calibration to off-line database…………………………...………..64

CPS MIP calibration……………………………………………………………….69

About Charge Inject ………………………………………………………………73


3

Calibration in Brief

Ask DAQ shifter to take crates 0x50, 0x51, 0x52, 0x53 and 0x13 out of global runCalibrate discriminator thresholds for crates 0x50, 0x51, 0x52 and spare boards in 0x53.

Set parameters and downloadTake dataTransfer calibration results from calibration tables to electronic tables

SDAQ run (with ITC option asserted) will put calibration constants into calibration tables

cft_gui uses electronic tables, therefore one needs to transfer calibration constants from calibration tables to electronic tables

Check the quality of calibration runCalibrate time, not needed for crate 0x53Align pedestals-this only after you installed new boardCalibrate analogue thresholds write peds_zero Thrs to afpga

Set run parameters and downloadTake dataTransfer calibration results from calibration tables to electronic tablesCheck the quality of calibration runthrsToAfpga

Download for global bias running Before re-turning crates to global run download all crates (click on download in cft_gui for each crate)

Calibration of analog thresholds has to be last step because analog thresholds may depend discriminator thresholds.

After installation of new board you have to calibrate discriminator thresholds (except of crate 0x53) and analogue thresholds. Do time calibration and align pedestal as soon as you can. Alignment of pedestals has to be followed by calibration of analogue thresholds.


4

Calibration in BriefWhen to make calibration

You need to make new calibration when:

New board was installed

Hit maps show “hot” regions and/or depleted regions

It usually takes three hrs to make full CFT calibration. Calibration depends on the temperature of AFE boards therefore it should be done when temperature is stable (archiver enables you to check that). Discriminator calibration needs to be done when there is no beam in the accelerator. Time calibration can be done with beam in the accelerator. Calibration of analog thresholds can be done with the beam in the accelerator, however you need to check that beam is not detected by CFT. To check if beam is detected by CFT look at pulse height distributions in layers closest to the beam: for example boards 5A6&A7, 3A2&3. I did often calibrate analog thresholds during proton injection tune-up.


5

Calibration in Brief

Go to DAQ shifter and ask to remove from the run CFT/PS crates, and crate 0x13.:Verify that crates are re-moved (check via monitor) including sequencer crates 3 and 5.Discriminator scan:

Participating crates: 0x50, 0x51,0x52, 0x53 (SPARE_VRB only)Disable non-participating VRBs in 0x53Set Parameters

Vthres not selectednsteps_v_thres 0x20v_thres2 = 0xd7disc_occ_fac 0xa

downloadTake data (“Free Trigger”, “Change Trigger”), takes about 1 hr.check database, new vthres, plot VrefVthres, plot Vthres changedownload Tript vthresRe-enable VRBs in 0x53

Time calibrationThresholds for Analog Signals

Set Parameternevents_noise 100.0

All crates participateSet Parameterswrite peds_zeroThrs to afpga downloadTake data (“Free Trigger”, “Change Trigger”), takes about 10 min. Check pulse

height distributions for AFE 5A6 (VRB-5210) , or AFE 3A2 (VRB-5110) for beam interactions (presence of counts well above pedestals), might take another run.

check database, new thresholds, plot thresholds changethrsToAfpga

Prepare for physics runFree Trigger in Takerdownload


6

SDAQ Parameters for Calibration of Discriminators

Click Modify database

Notice

nsteps_v_thres 0x20

v_thres2 0xd7

nevents_sift_hits 0x3e8

disc_occ_fac 0xa

cts_type_run 0x0

run_number 100.0

calinj_time_nstep 0

calinj_bits_nset 0

Vthres not selected

Itc selected

For tests with discriminator noise

of 5% set disc_occ_fac x32


7

SADQ parameters for Calibration of Thresholds for Analog Signals


Notice:

nevents_peds 10000.0

nevents_noise 100.0

nsteps_v_thres 0x0

nevents_sift_hits 0x0

run_number 100.0

calinj_time_nstep 0x0

calinj_bits_nset 0x0

Itc selected

For tests with 20 % noise set

nevents_noise 2000.0


8

SDAQ parameters for Time Calibration

Notice:nsteps_v_thres 0x0


injtime1,2,3 0x0,0x2,0x4

calinj_q 0xf

calinj_xing 0x3e (0x18 at cts)


injbit_set1, 8: 0x1, 0x2, … 0x8

Itc not selected

q, injected charge is f=1111

One trip injected charge, another trip injected charge

1111=f , large charge to both0101=5, small charge to both1010=a, medium charge to both

Histograms to look:AFE Hit MapPedestal Means vs VREF (containtime distributions for each channel)


9

Calibration of DiscriminatorsCheck That Temperature Control is Running

If you do this calibration because you just swapped AFE board, you might choose to calibrate only boards readout by VRB which reads out swapped board. Remember that discriminator calibration can always go wrong, so if you have little time do not calibrate full CFT/crate.

Click plot cryo for VRBCR_50

Examine cryo plot to see if temperature stable


10

Calibration of Discriminators

Go to DAQ shifter and ask to remove from the run the follwing crates:

All cft crates: 0x50, 0x51, 0x52, 0x53 ( CFT/PS)

Crate 0x13 (L1)

Verify that crates are re-moved (check via monitor) including sequencer crates 3 and 5.

Verify that accelerator status and alarm conditions are appropriate for calibration.

For each crate write peds_zeroThrs to afpga


11

Calibration of DiscriminatoresSetting Parameters for Calibration

Click global parameter

Click SDAQ Parameter


12

Calibration of DiscriminatorsSetting Parameters

Set Parameters


Notice

nsteps_v_thres 0x20

v_thres2 0xd7

nevents_sift_hits 0x3e8

disc_occ_fac 0xa

cts_type_run 0x0

run_number 100.0



Vthres not selected

itc selected

For tests with discriminator noise

of 5% set disc_occ_fac x32


13

Calibration of Discriminators

In crate 0x53 only last SPARE_VRB 5315 participates in discriminator calibration


14

Calibration of DiscriminatorsDownloading

Click download for VRBCR_50




Wait until download buttons turn green


15

Calibration of DiscriminatorsTaking Data

Go to screen numbered 10 (ioc xterms taker) in CFT Console Crib Sheet.

You should find there 4 terminals to ioc’s (ioc stands for input output controller) in VME crates 0x50 to 0x53. Calibration is run on these computers and you need to watch terminals for error messages. Prompt is -> and you can type pwd to get the identification.

d0olctl94 is ioc in crate ox50

d0olctl95 is ioc in crate 0x51


d0olcfl97 is ioc in crate 0x53

If terminals are missing you can start them by typing: telnet t-d0-mch2 2017, 2020, as shown below


16


Stay in screen numbered 10 (ioc xterms taker) in CFT Console Crib Sheet

Start taker

setup d0online

taker

Click on Modify

Click on Free Trigger-if allowed

Click on Change Trigger


17

Calibration of DiscriminatorsChoosing Configuration File for Taker

Choose the configuration file for the taker

Select Calibration

Select cft


18

Calibration of DiscriminatorsChoose Configuration File for Taker

Choose

calib-all-1.1

Click OK

Verify download is successful (as reported in taker window)


19


Click on Start in taker window.

Write calibration in Comment field.

Start button will change to Stop.

Watch DAQ monitor.

Watch ioc terminals for errors.

If you see the following error messages :

Stop run by clicking on Stop in taker window

Re-download the crate

Go back to first page of Taking data (remeber: Free Trigger, Change Trigger in Taker)


20

Calibration of DiscriminatorsTaking data

Check DAQ monitor and rate should be ~30 Hz, 0x50 should be 90 % L1 busy

Write in e-Log calibration run number

Do not worry about occasional messages like:

Wait until Stop button will turn to Start in taker window


21

Calibration of DiscriminatorsTransferring data to electronics database

Left click on VRBCR_50 (reached from cft_gui after clicking on details).

Click on check database to see if data got to CFT calibration tables in database, if not, wait and click again until data are in database

Click on new vthres (this transfers data from CFT calibration tables to electronics ‘ tables used by cft_gui to download electronics, CPS modules are skipped)

Right click on menu to get rid of menu.


22

Calibration of DiscriminatorsChecking the quality of Calibration runChecking Calibration Data In Database

Clicking on plot Vthres change will display the change of discriminator thresholds as compared to discriminator thresholds in previous calibration run

Document in e-Log if changes >5


23

Calibration of DiscriminatorsChecking the quality of Calibration runChecking Calibration Data In Database

Click on plot VrefVthres.

Look carefully for dips like you see on plot below in 8A2 and 9A1. These dips mean that calibration failed in boards 8A2 and 9A1. You might look at cft_sdaq plot “AFE Sift Disc Hit Map”. You will see that one module in those boards does not have discriminator hits.

You need to re-calibrate those boards. I usually re-calibrate boards readout by VRB reading out failed board.

Spike on the bottom plot of previous page indicates problem in calibration (of reference calibration in this case).

Dip at 9A7 is okay, caused by few unresponsive VLPCs/


24

Calibration of DiscriminatorsTransferring data to electronics database

Click on download Tript vthres


25

Do steps in pages 21-24 for each crate

Re-enable disabled boards in 0x53

For each crate: thresToAfpga


26

Checking the Quality of Calibration Runcft_sdaq is examine for sdaq run

This is optional:

setup d0online

cft_sdaq

username:

password:


27

Aligning pedestals

This is done rarely. If you swapped board you need to do it, but it does not have to be done before the first store with new board.

The values to which pedestals will be aligned in calibration run are hard coded in smt_device_2afe.py in the following lines:

AFE2PED=8 (for cps)

AFE2PEDFT=45

AFE2PEDFPS=10 (for fps)

The procedure for alignment of pedestals is following:

1. Decrease bias by 0.4 V

a) Set bias_offset to –0.4 ( reachable via global parameter->SVX Parameter)

b) From VRBCR menu: update bias

c) From VRBCR menu: On bias

2. From VRBCR menu: zero peds_thrs in afpgas

3. Do analog thresholds calibration run (set SDAQ Parameters for analog thresholds calibration run, download crate, make run with the help of taker)

4. From VRBCR menu:

a) check database

b) new ft peds if you are calibrating cft : crate 50

c) new ft peds , new cps peds if you are calibrating cps: crate 51, 52

d) new fps peds if you are calibrating fps: crate 53

5. From VRBCR menu: write peds_zeroThrs to afpga

6. Download standard bias, as in 1) but with bias_offset set to 0.0

7. Do analog thresholds calibration run (set SDAQ Parameters for analog thresholds calibration run, download crate, make run with the help of taker)

8. From VRBCR menu: check database, new thresholds

9. From VRBCR menu: write peds_thrs to afpga

10. Restore bias by setting bias_offset to 0.0V, update bias, On bias

You can write constant value to cft and fps pedestals in database by clicking on update ft peds to AFE2_pedestal. x7f results in pedestals around 55.


28

Calibration of Time, 3/10/10

Time calibration does not have to be done before first store with newly swapped board.The procedure is following:1. Decrease bias by 4.0 V a) Set bias_offset to –4.0V (in SVX Parameter menu, reachable from global

parameter button) b) From VRBCR menu: update bias c) From VRBCR menu: On bias2. From VRBCR menu: increase Tript vthresh, do this 7 times (at cts set discriminator

thresholds to xdc=220)3. From VRBCR menu: download Tript vthres4. With the help of AFE menu (global parameter->AFE Parameter->AFE2_threshold) set

AFE2_threshold to xa0 (for cps threshold should be x12) 5. From VRBCR menu: write peds_AFE2thrs to afpga 6. Set parameters for sdaq run as shown on page 307. Download crate by clicking on download in cft_gui8. From VRBCR menu: set EPICS passive9. Close AFE monitoring script10. Do sdaq run with the following settings: a)trigger: led/led-0x b)set appropriate registers in trigger framework for triggering on Xing 63. In the

Register I/O Menu: Vertical Interconnect Master = 1, Vertical Interconnect Slave=2, Card Slot=21, Chip Address=16, Register Address=41, Write Data=60 (this is 3 less than the tick you want to select), decimal data format has to be selected, click Write button.

9. Calibration file will be created with the following name: /projects/D0cft/commiss/sdaq/data/VRBCR_5xruny.qinj

10. Check the quality of calibration by looking at the following histograms: a) AFE Hit Map. Look at all AFEs. Below is what you should see for cft and cps AFE

boards. If Hit maps have structure, repeat the run and check again hit maps for all AFEs.


29

Calibration of Time, 3/27/09

b) Pedestal Means vs Vref. Ttitle is incorrect, these are time distributions, one plot per channel. Just look at few pixels.

To recover from Time Calibration do the following:1. From VRBCR menu: reset after charge inject2. From VRBCR menu: set EPICS scan3. Restart AFE monitoring: start_daq afe_monitor4. Download standard bias, as in 1) on previous page, but with bias_offset set to 0.05. From VRBCR menu: decrease Tript vthresh, do this 7 times6. From VRBCR menu: update cps disc thres-not needed for crate 0x507. Quit and restart cft_gui-not needed for crate 0x508. From VRBCR menu: download Tript vthres9. From VRBCR menu: write peds_thrs to afpga

In order for ft_examine to use new time calibration do the following:1. cd /online/examines/p20.11.01/ft_examine/cft_unpdata/peds2. cp /projects/D0cft/commiss/sdaq/data/VRBCR_xruny.qinj .3. cd ../rcp4. edit in CftCalibData_nodb.rcp line: int TCalibRunList with time calibration run

numbers for crate 50, 51, 525. re-start ft_examine


30

SDAQ parameters for Time Calibration

Notice:nsteps_v_thres 0x0


injtime1,2,3 0x0,0x2,0x4

calinj_q 0xf

calinj_xing 0x3e (0x18 at cts)


injbit_set1, 8: 0x1, 0x2, … 0x8

itc not selected

q, injected charge is f=1111

One trip injected charge, another trip injected charge

1111=f , large charge to both0101=5, small charge to both1010=a, medium charge to both

Histograms to look:AFE Hit MapPedestal Means vs VREF (containtime distributions for each channel)


31

Calibration of analogue Thresholds

This is a must after you swapped AFE board.

Go to DAQ shifter and ask to remove from the run the following crates:

All cft crates: 0x50, 0x51, 0x52, 0x53 ( CFT/PS)

Crate 0x13 (L1)

Verify that crates are re-moved (check via monitor) including sequencer crates 3 and 5.

Verify that that accelerator status and alarm conditions are appropriate for calibration.


32

Calibration of analog thresholdsChecking Temperature

Click plot cryo for VRBCR_50, VRBCR_51, VRBCR_52 and VRBCR_53

Check that temperature is stable


33

Calibration of analog thresholdsSetting Parameters for Calibration

Click on global parameter

Click on SDAQ Parameter


34

Calibration of analog thresholds Setting Parameters

Set Parameters:


Notice:

nevents_peds 10000.0

nevents_noise 100.0

nsteps_v_thres 0x0

nevents_sift_hits 0x0

run_number 100.0



itc selected

For tests with 20% noise set

nevents_noise 2000.0


35

Calibration of analog thresholds AFEII boards

Click on write peds_zeroThrs to afpga.


36

Calibration of analog thresholds Downloading

Click download for appropriate crate(s) VRBCR_50, VRBCR_51, VRBCR_52, VRBCR_53

Wait until download buttons turn green


37

Calibration of analog thresholdsTaking Data

Go to screen numbered 10 (ioc xterms taker) in CFT Console Crib Sheet.

You should find there 4 terminals to ioc’s (ioc stands for input output controller) in VME crates 0x50 to 0x53. Calibration is run on these computers and you need to watch terminals for error messages. Prompt is -> and you can type pwd to get the identification.


d0olctl95 is ioc in crate 0x51


d0olcfl97 is ioc in crate 0x53

If terminals are missing you can start them by typing: telnet t-d0-mch2 2017, 2020, as shown below


38


Stay in screen numbered 10 (ioc xterms taker) in CFT Console Crib Sheet

Start taker (or use the one that is already started)

setup d0online

taker

Click on Modify

Click on Free Trigger-if allowed

Click on Change Trigger


39

Calibration of analog thresholdsChoosing Configuration File for Taker

Choose the configuration file for taker

Select Calibration

Select cft


40

Calibration of analog thresholdsChoose Configuration File for Taker

Choose calib-all-1.1 (if calibrating all CFT crates) or choose ….

Click OK

Verify download is successful (as reported in taker window)


41


Click Start in taker window.

Write calibration in Comment” field.

Start button will change to Stop.

Watch DAQ monitor.

Watch ioc terminals for errors.

If you see the following error messages :

Stop run by clicking on Stop in taker window

Re-download the crate

Go back to first page of Taking data (remeber: Free Trigger, Change Trigger in Taker)


42


Do not worry about occasional messages like:


43

Calibration of analog thresholdsTaking data

Check DAQ monitor: Rate should be ~19 Hz, 99 % L1 busy

Write in e-Log calibration run number

There should not be any alarm during pedestal stage of calibration run

Wait until Stop button will turn to Start in taker window


44

Calibration of analog thresholdsTransferring SVX thresholds to Electronic Database

For each crate that participated in calibration run:

Left click on VRBCR_x (reached from cft_gui after clicking on “details”).

Click on check database to see if data got to CFT calibration tables in database, if not, wait and click again until data are in database .

Click on new thresholds to transfer calibration to electronics’ tables in database

Click on plot thresholds change.

Click on write peds_thrs to afpga.

Right click on menu to get rid of menu.


45

For each crate:

Click plot thresholds change

Calibration of analog thresholdsHow to compare current calibration values to the old ones


46

Checking the quality of Calibration runChecking Calibration Data In Database

After clicking on plot thresholds change the display will show up:

Document in e-Log changes >5.


47

Checking the Quality of Calibration Runcft_sdaq is examine for sdaq run

This is optional:

setup d0online

setup onl_cftcalib

cft_sdaq

username:

password:


48

Calibration Constants on 21 November 08

Boards with “ragged” SVX thresholds, like board 3A2, have 4 edge modules connected to CFT detector, and 4 middle modules connected to CPS detector


49

Calibration Constants on 21 November 09

Boards with “ragged” SVX thresholds, like board 4A2, have 4 edge modules connected to CFT detector, and 4 middle modules connected to CPS detector .


50

Patching when calibration constants do not make to database

Calibration constants are transferred to database by Calibration Manager written by Taka Yasuda. We had instances when Calibration Manger fails to do that. When that happens we need to do that ourselves (calibration programs writes “flat” files with calibration constants).

Click on SDAQ Parameter.


51


run_number needs to be 100, if not type in 100.0 .

Click on Modify database.


52


Right click on VRBCR_x menu.

Click reference_run_vthres if you calibrated discriminators.

Click reference_run_svx, if you calibrated analog thresholds.


53


Type in calibration run number and click Modify database.


54


Left click VRBCR_x menu.

\

Click insert CFT_PEDESTALS , insert individual SVX thr, followed by new thresholds if you need analog thresholds.

Click insert vthres , followed by new vthres if you need discriminator thresholds.

All this takes a while to complete


55

Using Old Calibration Run

In SDAQ Parameter menu type into run_number calibration run_number.

In VRBCR_x menu click on new thresholds or new vthresh.

Type back 100.0 into run_number.


56

Preparing for Global Run

download all crates.

Free Trigger in taker.


57

Power cycling and insertion of new AFEII boards

Disable AFEII boards that were neither inserted nor power-cycled.

For example, below you see what you would do if any boards 6B* were either inserted or power-cycled.

Click on write Personality to FLASH-this is needed only for newly inserted boards.

Click on prgFPGAs, dld+AFEII init.

If you only power-cycled boards click on thrsToAfpga at top bar buttons, re-enable disabled boards and click on download, if you inserted new AFEII boards go to next pages.


58

Insertion of new AFE boards

Update AFE tables in database-there are instructions from Stefan how to do that.

Quit cft_gui

Restart cft_gui

Open VRBCR_x menu:

Click update bias, On bias.

For left handed boards click also on temperature control off, temperature control on.


59

Insertion of new AFE boards

Click on update EPICS.

At that point CFT Alarm Display should not report any errors.

Now you need to do calibration


60

Looking at data

Program cft_sdaq will allow you to look at histograms accumulated in the calibration run. To invoke the program:

setup onl_cftcalib

cft_sdaq

username:

password:

Histoscope and CFT Online Calibration windows will appear


61

Looking at data

Expand VRBCR_52

Highlight FPD_VRB_5219 if you want to look at data from fpd detector

Choose histograms you want. Here AFE Rms were chosen

Click Start

Go to histoscope window to see the histograms


62

Looking at data

Also AFE Mean could be of interest


63

Looking at data

Also of interest are:

Pulse Height, OnlyChannel 61

AFE Hit Map


64

Transferring Calibration To Off-line Database

Transfer calibration constants to off-line database from cft_gui.

For crates 0x50, 0x51 and 0x52 (Crate 0x53 is fps crate and transfer to off-line is done by Anatoly Evdokimov) click on the following:

1. update thresholds in CFT_PEDESTALS, for crates 0x51,0x52 and 0x53

2. insert offline PED

3. insert PE thresholds

4. insert offline THRS

5. update previous

Run number in offline calibration database is the same as run number in SVX_RUN_NUMBER in VRBCR database parameters, as long as run_number in SDAQ Parameter page is smaller than 1000. Otherwise run number in offline data base is set to RUN_NUMBER in SDAQ Parameter page (reachable in cft_gui from global parameter).


65


Transfer to offline for CPS/FPS is done by Anatoly Evdokimov. You need to send e-mail to Anatoly with run number (s). CPS and FPS are readout by crates 0x51, 0x52, and 0x53. Crates 0x51 and 0x52 readout CFT and PS, crate 0x53 reads out FPS.

This e-mail needs to be sent after you did item 1 on previous page

(update thresholds in CFT_PEDESTALS for crates 0x51, 0x52 and 0x53)


66


You do not need to read this page to do the transfer. The data are transferred for run# that you get by right clicking on VRBCR_x and clicking on calib_run_svx.

calib_run_svx is updated after calibration of analog thresholds when you click on new thresholds. So you do not need to do anything. However you could change calib_run_svx by writing New value and clicking on Modify Database.


67


On online machine:


68


ssh -l calib d0ol102


69

CPS MIP Calibration, 3/27/09

CPS MIP calibration run needs 2 million triggers, if muon system is not working rate of useful tracks decreases buy 3 therefore one needs three times more triggers. Not working calorimeter is okay .

CPS MIP calibration is done with collider data after reprogramming CPS tripts to high gain, and reprogramming AFPGAS so that the pedestals are at ~55 ADC count (8 for standard CPS configuration). The whole process consists of 4 following steps:

1. Between stores CPS tript gains are set to maximum by writing 7 to gain register, and CPS pedestals are set to 55 by writing 127 to AFPGAS for the value to be subtracted from ADC counts. SDAQ threshold calibration run is taken with noise of 20%.

2. Return to standard CPS configuration since most probably CPS MIP run will not follow immediately SDAQ run.

3. CPS MIP in store calibration run with settings as in point 1 and CPS thresholds from calibration run in point 1. Here one allows that CFT was re-calibrated after run in step 1, this is non-standard since until now one crate was always calibrated in one run.

4. Return to standard CPS configuration.

Effort was made to optimize time needed since setup in points 3 and 4 will waste collider data

nevents_noise is set to 2000.0 for 20% noise


70

CPS calibration, 5/12/09

Items between paraenthesis ‘ ‘ are in VRBCR menu

Tript_vthres, tript_gain and AFE2_pedestal are set in AFE Parameter page reached from global parameter button.

1. Calibration:

‘update cps vthres to tript_vthres’ tript_vthres x96

‘download cps Tript vthres’

‘update cps tript gain to tript_gain’ tript_gain 0x7

‘download cps tript gain’

‘write peds_zeroThrs to afpga’

‘write cps AFE2peds_zeroThrs to afpga ‘ AFE2_pedestal 0x7f

set ‘bias_offset’ in ‘SVX Parameter’ menu to -0.4

update bias

On bias

take SDAQ special pedestal run-this run is pedestal run for CPS energy calibration

set ‘bias_offset’ in ‘SVX Parameter’ menu to 0.0

update bias

On bias

SDAQ Parameter : nevents_noise: 2000.0

take SDAQ special thresholds calibration run, this run will be used to set thresholds for CPS data calibration run

do not do ‘new thresholds’

2. To return:

‘update cps disc thres’, ‘update cps tript gain’,

restart gui

‘download cps Tript vthres’, ‘download cps tript gain’,

‘write peds_thrs’ to afpga or do calibration run


71

CPS calibration 5/12/09

3. CPS in store calibration:

‘update cps vthres to tript_vthres’ tript_vthres x96

‘download cps Tript vthres’

‘update cps tript gain to tript_gain’ tript_gain 0x7

‘download cps tript gain’

SDAQ run# = calibration run # of SDAQ special thresholds calibration

‘new thresholds’

‘write cps AFE2peds_thrs to afpga ‘ AFE2_pedestal 0x7f

make one short fake run

download crates, reset CTT

4. To return to std. running:

‘update cps disc thres’, ‘update cps tript gain’

restart gui

‘download cps Tript vthres’, ‘download cps tript gain’

SDAQ run#: std calibration run#

‘new thresholds’

‘write cps peds_thrs to afpga’

make one fake run

download crates, reset CTT


72

CPS calibration 5/12/09

5. Database calibration issues

Put into online database SDAQ special calibration with run#= CPS_data_calibration_run#-1:

reference_run_svx = SDAQ special pedestal calibration run#

run_number in SDAQ Parameter menu = CPS_data_calibration_run#-1

insert CFT_PEDESTALS

reference_run_svx = SDAQ special thresholds calibration run#

insert individual SVX thr

calib_run_svx = CPS_data_calibration_run#-1

update thresholds in CFT_PEDESTALS

run_number in SDAQ Parameter menu = 100

Crate .stat file with run#= CPS_data_calibration_run#-1:

Put into online database SDAQ standard calibration but with run # equal to the first data run# after CPS data calibration run – 1

reference_run_svx = SDAQ standard calibration run#

run_number in SDAQ Parameter menu = CPS_data_run#-1

insert CFT_PEDESTALS

insert individual SVX thr

calib_run_svx = CPS_data_run#-1

update thresholds in CFT_PEDESTALS

run_number in SDAQ Parameter menu = 100

Create corresponding .stat file.


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About Charge Inject

For CFT time calibration we set charge injected to xf.

Other values are used sometimes. The meaning of bits is following:

q_inj =xy

x is fine time tuning

y is charge magnitude

y = xf =1111 large charge injected to both tripts

y = x5=0101 small charge injected into both tripts

y = xa=1010 medium charge injected into both tripts

Documents

Calibration of CFT Detector