[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
Friday, Oct. 14, 2011
1:30PM
Room F224/225

Cookies & Coffee at 1:15

**Thomas K Hemmick
Stony Brook University
 
"New Technologies for Cherenkov Light Detection" *

With each new generation of detectors, experimental physics becomes
more ambitious.  This includes low mass and high precision tracking
techniques as well as advanced methods of particle identification
pushing the lab momentum threshold ever higher.  Cherenkov light, and
particularly ring imaging of that light provides exquisite precision
in particle velocity for high momentum PID.  Advancing the boundary of
high momentum particle ID requires harvesting sufficient light from
low index radiators and is frequently hampered by cost-driven space
limitations on the radiator gas length.  A novel approach was
successfully demonstrated in the PHENIX "Hadron-Blind Detector" using
CsI photocathodes directly evaporated upon Au-coated GEM foils.  This
techniques was shown to yield 22 photo-electrons from only 50 cm of
CF4 gas (n=1.00062).  The technology of the existing HBD and new
research directions driven by requirements of a future Electron-Ion
Collider will be discussed.


Thomas K Hemmick
Stony Brook University


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