HCAL Front End Boards

HCAL – Technical Meeting 24.2.2005

• Status of the FE Boards

• Parameter Shift Register

• Time Schedule

• Test Setup

Mathias Reinecke

HCAL Base Board - HBAB

Mathias Reinecke HCAL – Technical Meeting 1

Features :

- Base board for 6 Analog Boards (HAB)

- Communication with DAQ (CERC)

- Trigger for CMB board

- Two versions : ECAL left and right populated

Status :

- 2 Boards in production (‚right populated‘), production + assembly : 3-4 weeks

- design of ‚left-populated‘ : finished in 1 week

HCAL Base Board - HBAB

Mathias Reinecke HCAL – Technical Meeting 2

‚Left-Populated‘

Dimensions :47.5 x 19 cm²

Height (Board + Components) :15.5 mm

HCAL Analog Board - HAB

Mathias Reinecke HCAL – Technical Meeting 3

Features :

- Carries one LAL ASIC (18 SiPM channels)

- HV filtering and SiPM biasing

- Communication with HCAL Base Board

- Temperature monitor on board

Status :

- 2 Boards fully assembled

- 26 Boards available (not assembled)

HCAL Analog Board - HAB

Mathias Reinecke HCAL – Technical Meeting 4

Connector to Base Board

Temperature Monitor

Analog Test Output

ASIC

Analog Line Driver

Parameter Shift-Reg

Dimensions :

9 x 6.2 cm²

HCAL Testboard

Mathias Reinecke HCAL – Technical Meeting 5

Status :

- 2 boards fully assembled

- one board unassembled (spare)

Features :

- Base board for one HAB

- Interfaces 18 SiPMs

- Corresponds to ECAL ‚Left Populated‘

- Charge injection inputs (test)

HCAL Testboard

SiPM Interface, 18 chns.

Charge Injection

Power CMB Control

Test Outputs (SRIN, TCALIB)

Mathias Reinecke HCAL – Technical Meeting 6

DAQ Interface

Dimensions:

16 x 16 cm²

HAB

Parameter Shift Register

Mathias Reinecke HCAL – Technical Meeting 7

Task : Definition of operating parameters

Total length : 960 bits (one shift reg. for 6 HABs)

Loading clock : 1..10 kHz

Loading time @ 1 kHz : 1 sec per Base Board Switch : physics /

calibration mode

Timeline

Mathias Reinecke HCAL – Technical Meeting 8

Risks / Delays :

• Test of series production : board by board till mid August 2005 (500 HABs, 80 HBABs). Manpower for DAQ software and series test ?

• Design errors on HBABs (delay per redesign : 7 weeks)

• A lot of unknown features : Noise, temp.-stability, dynamic range, mechanical interface to SiPM cassette, CMB interface (ground loops etc.)

Test Setup

Mathias Reinecke HCAL – Technical Meeting 9

Series Board Tests (HAB) :

- Power dissipation

- Loading shift register

- Noise/Pedestal level

- Calibration pulse / Readout

- HV strength

Test of HBABs with HABs :

- Communication with DAQ

- HV strength

ChargeInjection

Summary

Mathias Reinecke HCAL – Technical Meeting 10

• System concept can be tested now !!

• Characterization with SiPMs : 2nd half of March

• First HCAL layer (series production) : July 2005

• Time schedule is tight : no redesigns included, implies full access to manpower and resources,

needed time for series test not clear • Preliminary user manual available : https://www.desy.de/~sefkow/HCALelectronics.html