CherenkovCounter < BL4S

Cherenkov counters detect the light emitted by charged particles passing through a medium when the velocity of the particle is greater than the velocity of light in the medium.it is possible to fill the detector with a gas, possibly under pressure, so that the detector will respond only to particles with velocities exceeding some minimum value. 

---+ Development
%STARTSECTION{Development}%
   | *Date* | *Action* |
   | 2015-08-18 | Worked with the beam instrumentation people to change gas in the Cherenkov volumes%BR%Achieved a vacuum of 10 mBar |

%ENDSECTION{Development}%

---+ Simulation
There is a simple simulation of a gas volume in the BL4S SimulationSoftware. See SimulationSoftware#CherenkovCounter.

---+ Documentation
   $ User instructions: http://sba.web.cern.ch/sba/Documentations/Eastdocs/docs/T9-Cerenkov-UG.pdf
   $ Operational note: http://sba.web.cern.ch/sba/Documentations/Eastdocs/docs/Cerenkov.pdf
   $ Secondary Beams for Tests in the PS East Experimental Area; Chapter 4.2.1: http://ps-div.web.cern.ch/ps-div/Reports/PA9321/Guide/Cerenkov.html

From the guide, Chapter 4.2.1, the geometry of the detector is given in drawing EP 82.550. The entry and exit windows are 0.6 mm Mylar and the PMT is model !XP2020Q. This information was last updated in 1993, so it is uncertain if this is current.

---+ Location of the T9 Cherenkov detectors
     [[%ATTACHURLPATH%/Cherenkov_locations.jpg][<img src="%ATTACHURLPATH%/Cherenkov_locations.jpg" alt="Cherenkov_locations.jpg" height="400" />]]

-- Main.CandanDozen - 2015-03-18

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
jpg	Cherenkov_locations.jpg	r1	manage	2464.3 K	2015-03-19 - 18:49	TimBrooks	Annotated photo of Cherenkov detectors in T9 beamline

This topic: BL4S > WebHome > CherenkovCounter
Topic revision: r7 - 2015-12-10 - TimBrooks