TPC ELECTRONICS

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On 28/11/2023 the thresholds of the TPC raw signal were measured and the measurements are reported in Table 1.

Table 1. TPC thresholds on the discriminator/amplifier

Signals	TPC21	TPC22	TPC23	TPC24	TPC31	TPC41	TPC42
A11	no access	-73,5	no access	-144,4	-366	-154,3	-163,8
A12	-72,7	no access	-159,3	-147,6	-387	-144,9	-164,9
A21	no access	-77	-158,3	-159,9	-353	-147,8	-160,7
A22	-157,1	-76,4	-144,7	-156,1	-405	-150,1	-166,8
DL1	-112,2	-108,9	-127,3	-195,4	-83,3	-152,2	-119,9
DR1	-79,7	-77,1	-117,3	-207	-110,9	-154,7	-116,4
DL2	-184,4	-71,3	-122,7	-196,8	-64,3	-150,6	-120,9
DR2	-180	-71	no access	-190,8	-49,6	-148,2	-127

On 28/11/2023 the thresholds of the TPC Sci-Sig raw were measured and the measurements are reported in Table 2.

Table 2. TPC calibration grid values.

TPC	Threshold on discriminator	High Voltage (V)	Current at no bema (\mu A)
TPC24	-15,3	500,5	178
TPC42	-45,6
TPC22	-46,5	600	213,5
TPC41	-49,6
TPC21	-64,5	600,5	214
TPC23	-136,5	500,5	178
TPC31		330	117,5

2021/Feb/09 (1)

- Change in electronics in the NIM crate in Messhuette:

• Set and fix delay in TPC module to be [minimum + a little]
• Move analog passive delay (from input of TPC module as it was) to after the analog output of TPC module for ADC
• Schematic diagram:

- Rough adjustment of electronics parameters using test pulses (t=0 for sc time references, t=900ns V=-140mV for Axx, t=1700ns V=-140mV for Dxx).
- Gain of the TPC module is set to get analog out around 1.5V.
- Delay of the TPC module is set to minimum + a little. Timing at NIMOUT is t=1200-1400ns for Axx, 1900-2100ns for Dxx.
- Multi-hit TDC V1190 has been installed (replacement for V775 TDC). Channel assignment is listed here.

2020/Nov/10

- checked which channels of the TPC modules (amp./discr/delay) are broken.
- List of the broken channels (link)

-- NisanYaprakBenal - 2026-10-30