35-ton Phase-2: Tests in Gas Heng-Ye Liao, Alan Hahn, Sarah Lockwitz - - PowerPoint PPT Presentation

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Dec 14, 2022 238 likes •456 views

35-ton Phase-2: Tests in Gas Heng-Ye Liao, Alan Hahn, Sarah Lockwitz 08/03/2017 Channel Map of Ground Planes Instrumentation TOP Bottom N 5 W E 7 1 2 6 S Vertical Beam Plug [Separated Plane] 3 up 8 Segmentation, 8 channels in

SLIDE 1

35-ton Phase-2: Tests in Gas

Heng-Ye Liao, Alan Hahn, Sarah Lockwitz 08/03/2017

SLIDE 2

Channel Map of Ground Planes Instrumentation

S N 1 5 6 7 W E TOP 2 Bottom Vertical 3 4 8 Beam Plug

[Separated Plane]

up down

Segmentation, 8 channels in total

SLIDE 3

Ground Plane: Circuit & Readout

[0]Circuit inside cryo [1]Flexible circuit outside cryo: Limit the input voltages to DAQ p.s. Voltage limit of the NI USB-6211 DAQ: ±10 V

Ground Planes instrumentation

39 V MOV 1 MΩ 4.7 MΩ 10 V TVS Diodes

[1] [0] DAQ

SLIDE 4

Ground Planes instrumentation DAQ

39 V MOV 1 MΩ 4.7 MΩ 10 V TVS Diodes R=5.7 kΩ

Voltage divider [1] [2]

Voltage limit of the ground plane DAQ: ±10 V [0]Circuit inside cryo [1]Circuit outside cryo to limit the input voltage to ±10 V [2]Circuit to reduce the high impedance

Simplified Electrical Circuit of Ground Planes Instrumentation

[0]

SLIDE 5

PMTs for Phase-II

N W E S

PMT 1 PMT 2 PMT 3 Vertical ground wall PMT 1 PMT 2 PMT 3

Photo from Eileen

SLIDE 6

Gas Tests

7/27: 53 ppm H2O & 10.5 ppm O2
7/28: ?
8/1: 42-32 ppm H2O & 1.6 ppm O2
8/2: 41 ppm H20 & 1.2 ppm O2

SLIDE 7

1 2 3 4 5 6 7 8

SLIDE 8

Event 1

SLIDE 9

Event 2

SLIDE 10

Event 3

SLIDE 11

Event 4

SLIDE 12

Event 5

SLIDE 13

Event 6

SLIDE 14

Event 7

SLIDE 15

Event 8

SLIDE 16

PMT Signals

*start time: 7/27/14:00:01 *end time: 7/27/16:59.59 *exposure: 179.92 min

PMT Channel # of ‘Active’ Event Event Rate [cts/min] 1 20 0.11 2 13 0.07 3 592 3.29

SLIDE 17

Looking for Time Correlations Between Ground Plane Signals & PMT Signals

7/28: Scope ch4 → GP ch1 (Top-West)
8/1: Scope ch4 → GP ch2 (Bottom)
8/2: Scope ch1 → GP ch1 (Top-West)

Scope ch4 → GP ch6 (Top-South)

SLIDE 18

SLIDE 19

Summary & Outlook

Ground planes instrumentation is working:

We see current draw on the ground planes

TPB-coated PMT sees more activities
More tests to come: Enlarge GP signal sizes
Any ideas are welcome!

SLIDE 20

Backup

SLIDE 21

Ground Planes instrumentation DAQ

39 V MOV 1 MΩ 4.7 MΩ 10 V TVS Diodes

Unity gain op amp [1] [2] Voltage of DAQ: ±10 V [1]Circuit to limit the input voltage to ±10 V [2]Circuit to reduce the high impedance