3 rd Libera Users Meeting – June 2009 Preparation work for ALBA’s Closed-Orbit BPMs 1/33 Preparation work for ALBA’s Closed-Orbit BPMs 3rd Libera Users

3rd Libera Users Meeting – June 2009

Preparation work for ALBA’s Closed-Orbit BPMs 1/33

Preparation work for ALBA’s Closed-Orbit BPMs


Angel Olmos



OUTLINE

• ALBA OVERVIEW

• LIBERAS, SINCE 2nd USERS

MEETING

• ALBA FAST ORBIT FEEDBACK

BEAM POSITION MONITORS

RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK

CORRECTION CALCULATION

POWER CONVERTERS

CORRECTOR MAGNETS



ALBA OVERVIEW

SLS type Booster and SR share the same tunnel

100MeV Thales LINAC

7 out of 32 beamlines on day one 1 Bending 1 Wiggler 1 SC-Wiggler 2 IV-Undulators 2 Apple II Undulators

Full energy 3GeVBooster



Schedule on August-06Jun-08 Building finishedNov-08 Booster commissioningMar-09 SR commissioning during 8 monthsOct-09 Beamlines commissioning

ALBA OVERVIEW

Schedule on April-09? Building not yet finished 12months delayJul-09 Cooling available 13 months delayOct-09 Booster commissioning 11 months delayMay-10 SR commissioning during 2 months 14 months delaySep-10 Beamlines commissioning 13 months delay

Beam for users, January 2011



Moving from University to ALBA site on April-09

ALBA OVERVIEWWhere are we now?




LINAC pre-commissioning done on Summer-08

Turn-key system from Thales LTB and LiDia CELLSresponsability

Temporally electricity and cooling

Full commissioning TBD by fall-09



Service Area (electronic racks) and Experimental Hall finished


Cooling and Air conditioning pending

Booster mechanical installation finished

SR 8 out of 16 sectors installed

Hutches and beamlines on the way

Cabling campaign has started



OUTLINE

• ALBA OVERVIEW


MEETING



RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK


POWER CONVERTERS

CORRECTOR MAGNETS



LIBERAS, SINCE 2nd USERS MEETING

- Not much ... that’s why I’m showing you other stuff - Two units (not really used) during LINAC pre-commissioning (release 1.8)

LINAC synchronization problem

Peak detector on Device Server for position calculation



- Development of a generic Matlab GUI for 2.0

Used for Lab testing of new SW releases

LIBERAS, SINCE 2nd USERS MEETING



OUTLINE

• ALBA OVERVIEW


MEETING



RF CABLES

LIBERA ELECTRONICS

FOFB NETWORK


POWER CONVERTERS

CORRECTOR MAGNETS



ALBA FAST ORBIT FEEDBACK

Beam Position Monitors BPM readout electronics

FOFB network

Correctors Power Converters (PC)

Correctors magnetsCorrection CPUs





FOFB network





BEAM POSITION MONITORSBeam Position Monitor block On chamber welded block including 4 button-type feedthroughs

Feedthroughs and BPM blocks tested during different stages at factory and at site




TDR head for reflection measurement 1- After manufacturing + Check manufacturing process + Calculate electrical behavior + Sort the buttons before welding

2- After welding on the BPM block + Prove that buttons are OK

3- After baking of the chambers + Final OK before delivery

Buttons measurements at factory (FMB)

Capacitance Dispersion < 1%




- Offset due to non perfect buttons and their placement in the block holes- Measured by external means. No wired method possible

S-paremeters measurement using a 4-ports network analyzer

BPMs Electrical Offset measurement at site




Processingof Tx coefficients

H/V offsets

Booster caseMax offset kept below 150 µm

BPMs Electrical Offset measurement at site





FOFB network





RF CABLES

- First stage of semi-rigid PEEK dielectric cables being installed (as Soleil case)

Tight space between magnets makes impossible to plug any cable without a pre-stage

After chamber bakeout

Chamber movement on top of half-opened magnets



- RF cables from the semi-rigids to the Liberas are on the way of production

RF CABLES

- 4 Andrew CNT-240 cables in a hosepipe (Copy+Paste cheap version of thecommonly used Time Microwave LMR-240)

- 5000m of cable ordered. Assembly of SMA connector to be done by cabling company



LIBERA ELECTRONICS

- As said, not much has happened

- Release 2.0 installed on 3 units but not yet tested

- Last tested software release was 1.82 (the one on the installed units)

- Matlab GUI for 2.0 developed but not really used

- About TANGO device server ... still “forking” on others job

- Small pseudo-server developed for LINAC beam peaks analysis

- HW installation of 120 Storage Ring units on the Service Area done

- Only 12 of the 28 Booster units installed. The others kept for Lab testing

- Report of failures/interventions:

+ Hardware patch (30). Ethernet cable length...Corrected

+ Wrong voltages (8) ... not used on Libera

+ Out of specs on BCM (2)

+ Out of specs on TbT rms, low # ADCs (2)

+ Noisy channel (1)

+ PM buffer not triggered (1)

Not corrected





FOFB network





Distributed architecture using 4 racks per sector (NT, Diagnostics, Controls, PCs)

FOFB NETWORK



Topology based on the use of network spare optical fibers to Sector 09

FOFB NETWORK



FOFB NETWORKPatch panel on Sector 09 will allow any combination of interconnections





FOFB network






- Original plan was to use MicroResearch reading board + distributed processing CPUs

- Pentium M running Linux 2.6 already installed but “under investigation”

- Not possibility of DMA on MicroResearch boards turns us to look for other solutions VMETRO? ... Tell me!!!!

- Distribution of data using Diamond Communication Controller internally agreed few weeks ago (discussions since who knows when)

- We will pay ITech for the integration job in our design

- Correction done with widely used SVD algorithm + PID controller




- Even though we have 120 BPMs and their corresponding Libera electronics, only position data from 88 BPMs will be used for orbit correction Why?

- Representation of β functions vs. phase advance shows that some BPMs give almost the same information (same info = no info)

- BPMs are better distributed according the vertical plane were more precision is needed





FOFB network





POWER CONVERTERSPower

converter

I/V transducer

ADC

PSIController

TxBoard

IPmodules

Carrier

cPCI Bus

RS232 service port

Electrical Optical

Optical protocol management

Commercial

Diamond

CorrectionCalculation

CPU

Optical

ALBA Controls rack

Correctos PCs rack

• Provide ±1mrad of DC deflection and ±40µrad @ 100Hz• Resolution of 18 bits• OCEM-Diamond PCs

Tested at factory but

not yet delivered



- Eddy currents on the vacuum chamber reduce the effect of the magnetic field at high frequencies fH=235

HzfV=1550

Hz

Horizontal Steering

Vertical Steering

- All delivered and on installation process

- Chamber thickness reduction to 2mm in the correctors

CORRECTOR MAGNETS

FOFB limiting factor

- ALBA sextupoles have extra coils to provide H/V beam steering



- Half of the Storage Ring BPMs still pending. Measurement goes together with installation

WHAT’S NEXT?

- LTB, BTS and BOOSTER BPMs electrical offset measured

- On site measurement of RF cables lengths (by cabling company) connec. assembly- All RF cables will be checked after installation one by one

- Test Libera release version 2.03 in the Lab (probably our production version)- Develop graphical utilities for Booster and Storage commissionings

- Take decisions about “sniffer” boards and processing CPUs

- Implement an small FOFB in the lab before final installation

- Receive and test the correctors power converters

LINAC full commissioning by Sep-Oct 09 Booster commissioning right after LINAC

Storage Ring commissioning May-10



Preparation work for ALBA’s Closed-Orbit BPMs


Angel Olmos

Documents

3 rd Libera Users Meeting – June 2009 Preparation work for ALBA’s Closed-Orbit BPMs 1/33 Preparation work for ALBA’s Closed-Orbit BPMs 3rd Libera Users