Data gain table (and with / without DAC table)
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Data gain table (and with/without DAC table) H. Miyamoto for PDM & DP team LAL/IN2P3/Univ. Paris-Sud XI
description
Data gain table (and with / without DAC table). H. Miyamoto for PDM & DP team LAL/IN2P3/ Univ . Paris-Sud XI. 3 kinds of Data taken during the flight. DAC 250 (no gain table, no DAC table) No threshold adjustment , nor gain equalization - PowerPoint PPT Presentation
Transcript of Data gain table (and with / without DAC table)
Data gain table (and with/without DAC table)
H. Miyamoto for PDM & DP teamLAL/IN2P3/Univ. Paris-Sud XI
3 kinds of Data taken during the flight• DAC 250 (no gain table, no DAC table)
– No threshold adjustment, nor gain equalization– 13 NIST pixels obtained in pre-flight calibration– C. Moretto’s presentation
• Data with DAC table– PDM calibration was done in this condition– 20 NIST pixels obtained in pre-flight calibration
• Data with gain table (with DAC250)– Gain table based on the calibration with test_ec_board is used.– HV majority for each EC_unit are 1000~1100V instead of 950V (operation
voltage)– Not optimized with PDM condition, but still better equalization in pulse
heights– Taken mainly to demonstrate the function– 13 NIST piexels obtained in pre-flight calibration
DAC (threshold) and pulse height (gain)EC2 s-curves, DAC250, DACtable (260,230,250,220)
DAC table
• Based on PDM measurement -- high statistic s-curve (25 packet, step 1, DAC 0-600) in LISA vacuum vessel at APC
• Many EC-unit have too low gain with HV950V• Remain DAC250 for such EC-units
220 250 260 230 230 240
250 220 260 240
240 240 240
240 230 230
270 260 270 250
270 270 270 240
dactable.txt used for the flight
Gain Table
36 x 64 ascii input file:(ASIC0,Ch0) (ASIC0,ch8) (ASIC0,ch16) … (ASIC0,ch63) (ASIC0,ch1) (ASIC0,ch9)….(ASIC1,Ch0) (ASIC1,ch8) (ASIC1,ch16) …….…
(ASIC0,Ch0) (ASIC7,ch0) (ASIC0,ch16) ….(ASIC0,Ch8) …….…
Ok, too complicated for now, we will make summary/techinical document near future….
After long fight since April, we made it work on July 1st 2014
Gain equalization with test_ec_board
Light source(LED in optical integration sphere)
EC-unitEC-ASICboard
EC-ASICtest board
S-curves before eq.(gain 64 for all pixs)
S-curves after eq.(With gain table)
EC_unit109 PMT_A
50 100 150 200 250 300 350 400 450 50050 100 150 200 250 300 350 400 450 500
Gain equalization with test_ec_board
Light source(LED in optical integration sphere)PDM
S-curves before eq. S-curves after eq.
EC_unit109 PMT_A
Before/after equalization (PDM)EC7 EC7
EC9 EC9
Summary
• Analysis of absolute efficiency with gain table configuration is ongoing in the same method as other two conditions (no gain table, with/without DAC table)
• Further calibration will be done after PDM returning to Paris (in November?)
• When it’s ready, would be implemented in the table for the analysis with other parameters
