ToF Pager Guide

Index:


Introduction

The Time-of-Flight detector consists of a cylindrical array of 216 scintillator bars read out at both ends by PMTs. The scintillators are 4x4x278 cm and are located between the COT (r=138 cm) and the magnet (r=142 cm). The PMT HV is controlled through a PC in the 1st floor running a SMACS and an iFIX program which allows HV operations from the Control Room. The electronics reside in slots 5 through 10 of the wall calorimeter crates, WCAL00 through WCAL07. For TAC calibrations one also uses the calorimeter pulser, B0PULS01, which triggers a Digital Delay Generator (DDG). For each of the 432 channels of electronics (one channel per PMT), one reads out a time through a "decaf" card and a charge through a "cafe" card. For more detailed information about the ToF detector you can follow these links:
Duties

Basically, there are 6 things that need to be done:
  1. Attend the 8:00 am meeting to find out the plans for the day and request ToF resources (wcal00->wcal07,b0puls01) if necessary.
  2. Keep an eye on the High Voltage
  3. Check online (QIE and TAC) calibrations taken by shifters (use DBANA and see instructions under Online Calibrations).
  4. Check quality of recorded data (use YMON and see instructions under Data Monitoring).
  5. Keep track of ToF activity in the ToF e-log and report activities, incidents, problems to the ToF group by e-mail and make an entry on the e-log.
  6. Respond to all pages and contact the necesary experts if needed.
ToF Contacts

Problems or situations will arise which need the intervention of a ToF person other than the one carrying the pager. You can find out who you should call and how to contact him/her following this link:
Last modified: Thursday, August 22, 2002.