Testing SHMS Preshower

Status

• The SHMS Calorimeter has been cabled with signal and HV.
• Have checked setting each channel to 1400V that signal is seen.
• Altered voltages within SHMS Calorimeter to match around 50 mV per tube.
• Added external PMT's across top of calorimeter, 6 in total,
• 06/28 Taking data for number of events through calorimeter and external PMT's
• 07/10 Added diagram of Modules and Live connections
• 07/18 Added plots of SHMS Cal. data

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	Threshold	End Date/Time	Events	HV figure	Comments
34	July 30th 17:53:19	P1 && P14	20mV	July 31st 09:29:09	368	Pos HV]	TDC range 1024ns (250ps/ch)
35	July 31st 09:37:27	P1 && P2	20mV	July 31st 10:29:10	2178	Pos HV]	TDC range 1024ns (250ps/ch)
36	July 31st 14:29:14	P1 && P2	20mV	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	July 31st 14:56:13	738	Pos HV]	TDC range 1024ns (250ps/ch power outage ending run)