CDF-II Time-of-Flight Detector

Recent Internal Notes

Internal notes are accessible to CDF collaborators but can be made available on request.

June 15, 2005	CDF Note 7693	Deformations of the Scintillator in the Time-of-Flight System
May 2, 2005	CDF Note 7620	Sources of Bias in Time-of-Flight Measurements
March 24, 2004	CDF Note 6948	TOF Calibration Studies

Electronics Resources

Electronics for the TOF detector was designed and built while I was at the University of Pennsylvania. Components of the clock distribution system have been built at Purdue.

Niharika Ranjan working on TOF electronics maintenance during the Tevatron's spring 2006 shutdown.

Links:

• TOF Online Operations
• TOF Electronics at Penn
• CDF Time of Flight Project Page
• Vendors and other Resources

Recent presentations relating to electronics:

TOF electronics maintenance:

• CDF TOF electronics information
• ADMEM maintenance related links:
  • Fixing corrupted flash RAM on ADMEMs
  • QIETest example
  • More general ADMEM configuration

Photon Transport Monte Carlo Studies

We have developed a Monte Carlo model that simulations the propagation of photons through the TOF detector and the response of the electronics. This has been used to study possible sources of bias observed in some classes of measurements.

Recent presentations relating to these studies:

TOF Alignment

We are determining new alignment constants for the TOF scintillator and find that deviations from the previously determined positions can be significant. This picture shows the difference between the new (blue/yellow) and the previously assumed (red) position of the scintillator. Radial shifts of order 1 cm are expected to have singificant implications for calibration and reconstruction.

Recent presentations relating to these studies:

The performance of the TOF system appears to be degrading with time. We are in the process of analysing the contributing factors and proposing various options for dealing with these issues.

Presentations relating to these studies: