Difference between revisions of "Solid calorimeter test stand"

From Hall A Wiki
Jump to: navigation, search
(Test results and weekly meeting)
Line 47: Line 47:
== '''Test results and weekly meeting''' ==
== '''Test results and weekly meeting''' ==
*Uniformity test : [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/PMT_test_updates_2014_6_17.pdf Uniformity_test]
*Gain measurement by using scope: [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/gain_1.png plot] A typical signal of H10966 (Voltage = -450v):    [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/signal_450v.jpeg signal]
*Gain measurement by using scope: [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/gain_1.png plot] A typical signal of H10966 (Voltage = -450v):    [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/signal_450v.jpeg signal]
*2014-5-14 [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/2014_5_14.pdf pdf]
*2014-5-14 [http://hallaweb.jlab.org/12GeV/SoLID/download/ec/teststand/2014_5_14.pdf pdf]

Revision as of 12:29, 17 June 2014

EC test for SoLID

page infomation:



  • DAQ: done!
     Hardware: Done! VME based: CPU(VxWorks) + TI + 2V792 + NIM modules ---> can handle 64 channels
     Software: CODA 2.6.2 is already installed, and configuration is done!
     Decoding is done!
  • 2D table: done!
     It can be operated interactively through serial connectors.
  • MaPMT:
     H10966 on hand, from Wouter (W&M)
     H8500/10966 ---> Socket: "SQT-118-01-L-D SAMTEC"; 2 rows, 18*2 pins, 16 pins for signal, 1 of no use, others are GND 
     V792 ---> Socket for "3431-5202 Header-type male connectors"; 17*2 pins, 16 pins for singal, 1 of no use, others are GND
  • Black Box: done!
       Size: roughly 1m x 1m x 1m
  • LED related issues: done!
     LED system specs:
           3 pulsed LED and 1 continuous LED
           BLUE light, 470nm(2.637ev), 20mA current
           nominal luminous intensity: 232mcd (232*1e-3*4pi/62)*6.2415093433e+18/2.637 = 1.1e+17 photon/s

Test plan

  • 1.Calibrate ADC channels
     Using a generator to produce a well known amplitude signal to calibrate ADC: ADC counts <-> Charge
     WaveTek model 80 from 3He lab
  • 2.Gain VS Voltage scan (H8500: -350V <---> -1100V)
     Relative gain VS voltage curve:
        Sinle channel measurement is enough
        Setup: LED -> fiber -> Any single pixel -> Readout
        Or no fiber: LED -> Any single pixel -> Readout
     Absolute gain calibration:
        Yi has a photon calibration tube, I can use it to calibrate the absolute gain.
  • 3.Determine a low gain range for SoLID preshower
  • 4.Uniformity measurement at low gain case
     No fiber is needed in this test, open cathode
     Challenge: A uniform distributed light should be produced -> need to figure out,Yi has experience on this
     Setup: Uniform light -> open cathode -> 64 channels readout -> uniformity
  • 5.Cross talk measurement
     Size of a Pixel: 5.8mm X 5.8mm
     Setup: LED -> fiber -> pixel -> readout(surrounded pixels)
     As suggested by Yi, do a position dependent cross-talk study ---> scan fiber within a pixel to see the cross-talk effect
  • 6.Test with Pre-shower tile

Test results and weekly meeting


  • V792 Specs
     Input range 0 ---> 400 pC : 0 -> 2.5E9 electrons
     Gain per ADC channel: 100fC/channel  : 6.25E5 electrons/channel
     If we set PMT Gain to 5E3
        single photon electron location: 0.008*(amplifier) channel
        MIP location(assume 40 p.e):  0.32*(amplifier) channel (16 amplification--> channel 5)
  • H10966 Specs (Wouter's MaPMT)
     PMT sockets map: pic
     PMT pixel map: pic

equipment list

  • for MAPMT test
    • DAQ computer 1
    • VME crate 1
    • VME module of CPU 1, trigger 1, LED control with LED 1, ADC 1
    • NIM crate 1
    • NIM module, discriminator 1, Lin Fan-in/out 1, logic unit 1, translator 1, gate/delay 1
    • HV power supply 1
    • XY movement rack and controller 1
    • WLS fiber, some
    • MAPMT (H8500 or similar) 1
    • dark box 1
    • oscilloscope 1

UVa list

  • now in Xiaochao's office
    • PS726 level translator, SN12263 (HallC), SN21372,SN20024
    • PS974 quad gate/delay generator, SN25806, SN25805
    • PS744 quad linear gate Fan-in/out, SN18944 (problem)
    • PS740 quad linear Fan-in/out, SN12818 (HallC),SN12456
    • PS710 Octal Discriminator, SN18893 (HallC)
  • bought by Xiaochao, The serial numbers are from Ramesh's record.
    • 3x PS706 SN: 24509,24510, 24511.
    • 1x PS755 SN: 24508
    • 4x PS757 4 out of 9, 24472, 24473, 24506, 24507, 24455, 24456, 25618, 25807, 25808, record mixed UVa with JLab properties
    • 2 scalers, either SIS3820 or 3821. I don't have the SN#
  • according to Albert

1. PS706 SN: 24510- we use L HRS.

2. PS706 SN: 24511- we use L HRS

3. PS755 SN: 24508- we use L HRS

4. PS757 SN: 25807- in cabinet.

About rest, I don't see in my list.