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Development and Analysis of a 3GEM Beamstr. Monitor with Advanced Readout Capabilities

This document details the construction and analysis of a 3GEM beamstr. monitor designed with a 10 cm x 10 cm area featuring a 64-pad readout. Utilizing 8-channel ASDQs for data acquisition, the system allows for extensive monitoring despite limitations on channel outputs. The document discusses results from analysis runs, including noise levels, improvements in grounding, and the challenges faced with high discharge rates. Various configurations of the luminometer PCB and detailed discharge analysis are also included, providing valuable insights into performance enhancements.

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Development and Analysis of a 3GEM Beamstr. Monitor with Advanced Readout Capabilities

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  1. Beamstrahlung Monitor

  2. A 3GEM Beamstr. Monitor 10 cm 2.4 cm 2.4 cm 64 pads 10 cm A triple GEM 10x10 cm2 has been built with a 64 pixel 3 x3 mm2 The read out has been realized using 8 chip ASDQ (8 channel each) Actually non more than 64 channel readout is possible;

  3. Pictures Calorimeter 3GEM lead

  4. Analysis run 1381 (1-4-07) several channels masked due to high noise level

  5. y x y y x x Analysis run 1383 # hits time

  6. Time profile hits number in 10 msec

  7. Run 1414 (5-4-07 19:35) Improvements on grounding 1 2 3 4 1 2 0 5 10 15 20 min 3 4

  8. Luminometer

  9. Luminometer detail

  10. PCB with pads : two solutions 64 + 64 channel 200 mm 32 + 32 channel

  11. frames

  12. GEM foil

  13. GEM foils

  14. details of discharges Discharges with chamber powered at 1370 with Ar CO2 CF4: 55 40 5

  15. details of discharges Discharges with chamber powered at 1340 with Ar CO2 CF4: 55 40 5

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