Testing SHMS Preshower
From HallCWiki
Status ( updated Aug 16th)
- Run 69 going for the plus side. Moved P14 from splitter to a linear FI/FO to increase pulse size.
- Problems with FADC
- Missing data every other trigger
- After about 8000 events, errors start to show up for some events. See this example
- When comparing ADC spectra with and without cut on TDC see problem. With TDC cut expect ADC spectra to be only above the TDC threshold. But what is seen is just a general reduction of events. See this plot which shows the ADC spectra for the the 14 PMT without TDC cut ( black) and with TDC cut (red) for trigger of P1 and P14.
Computer Setup
- Computer is called cnu. The account is gep5.
HV Setup
- Can control the CAEN 403 through terminal on cnu.
- Open terminal
- type "su" to login as superuser.
- type "minicom"
- Listing of the HV setting and cable numbering for the preshower and scintillators
- Preshower HV for Neg and for Positive side on July 30th at 4:41
Event Data
- Coincidence data between SHMS Cal and external PMTs Hits per hour
- Diagram of modules used for collecting coincidence data Module Diagram
- Voltage versus PMT# plots for the negative and positive sides of the calorimeter. plot
Data taking Log
| Run number | Start Date/Time | Trigger | PreShower Threshold | Scintillator Threshold | End Date/Time | Events | HV figure | Comments |
|---|---|---|---|---|---|---|---|---|
| 34 | July 30th 17:53:19 | P1 && P14 | 20mV | N/A | July 31st 09:29:09 | 368 | Pos HV] | TDC range 1024ns (250ps/ch) |
| 35 | July 31st 09:37:27 | P1 && P2 | 20mV | N/A | July 31st 10:29:10 | 2178 | Pos HV] | TDC range 1024ns (250ps/ch) |
| 36 | July 31st 14:29:14 | P1 && P2 | 20mV | N/A | July 31st 14:35:00 | 144 | Pos HV] | TDC range 1024ns (250ps/ch power outage ending run) |
| 37 | July 31st 14:38:13 | P1 && P2 | 20mV | N/A | July 31st 14:56:13 | 738 | Pos HV] | TDC range 1024ns (250ps/ch) |
| 38 | July 31st 15:26:35 | P1 && P5 | 20mV | N/A | July 31st 15:47:02 | 119 | Pos HV] | TDC range 280ns (70ps/ch) power outage ending run |
| 40 | July 31st 19:43:43 | P1 && P5 | 20mV | N/A | Aug 1st 10:24:51 | 6367 | Pos HV] | TDC range 280ns (70ps/ch) |
| 41 | Aug 1st 10:33:25 | P1 && P2 | 20mV | 50mV | Aug 1st 11:04:16 | 1240 | Pos HV Scint HV | TDC range 280ns (70ps/ch) Added scintillators to the TDC with threshold = 50mV |
| 42 | Aug 1st 11:07:31 | P1 && P2 | 20mV | 50mV | Aug 2nd 9:38:29 | 55941 | Pos HV Scint HV | TDC range 1024ns (250ps/ch) |
| 43 | Aug 2nd 9:52:34 | P1 && P2 | 15mV | 40mV | Aug 2nd 11:46:39 | 9183 | Pos HV] Scint HV | TDC range 1024ns (250ps/ch) |
| 44 | Aug 2nd 11:55:03 | P1 && P2 | 10mV | 30mV | Aug 2nd 15:02:54 | 28155 | Pos HV] Scint HV | TDC range 1024ns (250ps/ch) |
| 45 | Aug 2nd 15:45:12 | P1 && P2 | 10mV | 30mV | Aug 2nd 17:26:06 | 26089 | Updated Pos Preshower HV Scint HV | TDC range 1024ns (250ps/ch) raised HV for bars 1,2,11 & 14 |
| 46 | Aug 2nd 17:48:46 | P1 && P6 | 10mV | 15mV | Aug 3rd 11:09:04 | 33524 | Run 45 Preshower HV Scint HV | TDC range 1024ns (250ps/ch) |
| 47 | Aug 3rd 11:10:29 | P1 && P14 | 10mV | 15mV | Aug 3rd 14:43:08 | 1090 | Run 45 Preshower HV Scint HV | TDC range 1024ns (250ps/ch) |
| 48 | Aug 3rd 14:47:49 | P2 && P14 | 10mV | 15mV | Aug 3rd 17:53:55 | 1243 | Run 48 Preshower HV Run 48 Scint HV | TDC range 1024ns (250ps/ch) Raised PSH1 HV, Scint Bot Mid HV |
| 49 | Aug 3rd 17:54:51 | P2 && P14 | 10mV | 15mV | Aug 6th 10:24:59 | 25869 | Run 49 Preshower HV Run 48 Scint HV | TDC range 1024ns (250ps/ch) |
| 50 | Aug 6th 10:33:46 | P2 && P14 | 20mV | 15mV | Aug 7th 09:31:34 | 2593 | Run 49 Preshower HV Run 48 Scint HV | TDC range 1024ns (250ps/ch) |
| 51 | Aug 7th 09:40:47 | P2 && P14 | 10mV | 15mV | Aug 7th 12:27:43 | 1178 | Run 51 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised HV on PSH1 & 2 |
| 52 | Aug 7th 12:32:51 | P2 && P14 | 10mV | 15mV | Aug 7th 16:33:46 | 1766 | Run 52 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised HV on PSH 3-8, 10 & 11 |
| 53 | Aug 7th 16:38:59 | P2 && P14 | 10mV | 15mV | Aug 8th 09:50:15 | 7583 | Run 53 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised HV on PSH 1,3-8,10 by 25V |
| 54 | Aug 8th 09:54:13 | P2 && P14 | 10mV | 15mV | Aug 8th 13:54:02 | 1860 | Run 54 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised all HV to 1600 except 2 (1550) |
| 55 | Aug 8th 14:01:04 | P2 && P14 | 10mV | 15mV | Aug 8th 15:39:46 | 966 | Run 55 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised all HV to 1650 |
| 56 | Aug 8th 15:44:28 | P2 && P14 | 10mV | 15mV | Aug 9th 09:45:36 | 12628 | Run 56 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Raised all HV to 1700 |
| 57 | Aug 9th 09:58:02 | P1 && P2 | 10mV | 15mV | Aug 9th 13:21:32 | 99370 | Run 56 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed trigger to p1 and p2 |
| 58 | Aug 9th 13:42:16 | N1 && N2 | 10mV | 15mV | Aug 9th 15:13:46 | 18024 | Run 58 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed sides to N side |
| 59 | Aug 9th 15:17:31 | N1 && N14 | 10mV | 15mV | Aug 10th 13:47:50 | 5633 | Run 58 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed trigger to N1 && N14 |
| 60 | Aug 10th 14:19:03 | N1 && N14 | 10mV | 15mV | Aug 13th 10:03:31 | 16130 | Run 60 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed HV on PMT# 3,5,6 |
| 61 | Aug 13th 10:15:54 | N1 && N14 | 10mV | 15mV | Aug 13th 13:38:57 | 1150 | Run 61 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed HV on all PMT# up 50 |
| 62 | Aug 13th 13:42:56 | N1 && N14 | 10mV | 15mV | Aug 14th 09:33:02 | 9564 | Run 62 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed HV on all PMT# to 1650 |
| 63 | Aug 14th 09:43:11 | N1 && N14 | 10mV | 15mV | Aug 14th 11:26:30 | 1047 | Run 63 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Changed HV on all PMT# to 1700 |
| 64 | Aug 14th 11:28:27 | N1 && N14 | 10mV | 15mV | Aug 15th 09:30:34 | 12698 | Run 63 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) no change looking for a bug |
| 65 | Aug 15th 09:35:43 | N1 && N2 | 10mV | 15mV | Aug 15th 13:28:56 | 112919 | Run 65 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) changed voltage on PMT 1 to 1650 and changed trigger to N1 and N2 |
| 66 | Aug 15th 13:47:07 | N1 && N3 | 10mV | 15mV | Aug 15th 16:44:47 | 37027 | Run 65 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) |
| 67 | Aug 15th 17:13:01 | N1 && N5 | 10mV | 15mV | Aug 16th 10:40:10 | 86159 | Run 65 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) |
| 68 | Aug 16th 11:08:18 | P1 && P14 | 10mV | 15mV | Aug 17th 10:07:08 | 13838 | Run 68 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Switch back to plus side |
| 69 | Aug 17th 10:20:06 | P1 && P14 | 10mV | 15mV | Run 68 Preshower HV Run 52 Scint HV | TDC range 1024ns (250ps/ch) Move P14 from Splitter to Linear FI/FO. |
