1. HCAL Front End Boards HCAL – Technical Meeting 24.2.2005 Status of the FE Boards Parameter Shift Register Time Schedule Test Setup Mathias Reinecke

2. HCAL Base Board - HBAB Mathias ReineckeHCAL – Technical Meeting1 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

3. HCAL Base Board - HBAB Mathias ReineckeHCAL – Technical Meeting2 Left-Populated Dimensions : 47.5 x 19 cm² Height (Board + Components) : 15.5 mm

4. HCAL Analog Board - HAB Mathias ReineckeHCAL – Technical Meeting3 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)

5. HCAL Analog Board - HAB Mathias ReineckeHCAL – Technical Meeting4 Connector to Base Board Temperature Monitor Analog Test Output ASIC Analog Line Driver Parameter Shift-Reg Dimensions : 9 x 6.2 cm²

6. HCAL Testboard Mathias ReineckeHCAL – Technical Meeting5 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)

7. HCAL Testboard SiPM Interface, 18 chns. Charge Injection Power CMB Control Test Outputs (SRIN, TCALIB) Mathias ReineckeHCAL – Technical Meeting6 DAQ Interface Dimensions: 16 x 16 cm² HAB

8. Parameter Shift Register Mathias ReineckeHCAL – Technical Meeting7 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

9. Timeline Mathias ReineckeHCAL – Technical Meeting8 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.)

10. Test Setup Mathias ReineckeHCAL – Technical Meeting9 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 Charge Injection

11. Summary Mathias ReineckeHCAL – Technical Meeting10 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