Testing SHMS Preshower

Status ( updated Aug 16th)

• Run 68 going for the plus side.
• 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.