Beam test results for the new DIRICH Setup for COSY beam readout - - PowerPoint PPT Presentation

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DPG 2018 V. Patel Overview Beam test results for the new DIRICH Setup for COSY beam readout chain for MAPMTs and MCPs test Test results Vivek Patel University of Wuppertal Deutsche Physikalische Gesellschaft (DPG), February 2018 Slide: 1

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DPG 2018

V. Patel

Overview Setup for COSY beam test Test results

Beam test results for the new DIRICH readout chain for MAPMTs and MCPs

Vivek Patel

University of Wuppertal

Deutsche Physikalische Gesellschaft (DPG), February 2018

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DPG 2018

V. Patel

Overview Setup for COSY beam test Test results

HADES-RICH upgrade

Exploded sketch of upgraded HADES-RICH

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DPG 2018

V. Patel

Overview Setup for COSY beam test Test results

Readout Electronics for RICH MAPMTs

Readout electronics for 3 x 2 MAPMT modules

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DPG 2018

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Overview Setup for COSY beam test Test results

Setup for COSY RICH testbox

Cherenkov prototype detector for COSY beam test in Nov 2017 Two fully equipped 3x2 module, 12 MAPMTs, glass/ quartz radiator. 6 of which were coated with wavelength shifting coating for testing UV efficiency.

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Overview Setup for COSY beam test Test results

Test Parameters and Initial results

There were many parameters tested during this beam test. Main motive was to check the DiRICH concept in real beam conditions.

In particular hit multiplicity. Noise behaviour in MAPMT and readout electronics. Ring sharpness. Single photon detection efficiency. Expected time precision from electronics.(HK21.4 - Time resolution

f the DiRICH MAPMT readout with and without WLS coverage by Adrian Amatus Weber)

To check the gain in photons due to wavelength shifting coating on MAPMTs.

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Overview Setup for COSY beam test Test results

Hit Multiplicity

Xpos(Pixel)

5 10 15 20 25 30 10 15 20 25 30

AllTDCs_HitDist2d

200 400 600 800 1000 1200 1400 1600 1800 2000 2200

AllTDCs_HitDist2d

AllTDCs HitDist2d

Mean 13.02 Std Dev 6.129

detected hits/trigger 10 20 30 40 50 60 70 80 90 200 400 600 800 1000 1200 1400 1600 1800

Mean 13.02 Std Dev 6.129

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Overview Setup for COSY beam test Test results

Hit Multiplicity

Threshold in mV 100 200 300 400 500 Number of photons 2 4 6 8 10 12 14

1100 V
1000 V
900 V

Multiplicity as a function of threshold voltage

Simulation : Expect 16 photons with measured quantum efficiency and 100% collection efficiency.

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Overview Setup for COSY beam test Test results

Hit Multiplicity

Hit Multiplicity for different combinations of WLS coating

Threshold in mV 50 100 150 200 250 Number of Photons 8 10 12 14 16 18 WLS on all the PMTS WLS on half of the PMTS WLS on none of the PMTS Slide: 8

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DPG 2018

V. Patel

Overview Setup for COSY beam test Test results

Hit Multiplicity

Hit Multiplicity ratios for different combinations of WLS coating

Threshold in mV 50 100 150 200 250 Ratio normalized to No WLS 1 1.05 1.1 1.15 1.2 1.25

Ratio of WLS on ALL pmts & WLS on NO pmt Ratio of WLS on HALF pmts & WLS on NO PMT Ratio of WLS on ALL pmts & WLS on HALF PMTs Ratio normalization to WLS on NO pmt

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DPG 2018

V. Patel

Overview Setup for COSY beam test Test results

Summary

Beam test at COSY was successful. Initial results shows that concept of DiRICH will work. WLS coating increases the Multiplicity ∽ 23% Plan is to equip inner part of HADES-RICH with WLS coated MAPMTs. Upgraded HADES-RICH will see its first beam in last quater of 2018 at SIS 18, GSI. Mass production of DiRICH has already began. It is expected that the delivery will start in March-April 2018.

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