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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!sun-barr!ames!pacbell.com!tandem!zorch!fusion
- From: ames!FNALD.FNAL.GOV!DROEGE
- Subject: Detectors
- Message-ID: <920826132615.20202e47@FNALD.FNAL.GOV>
- Sender: scott@zorch.SF-Bay.ORG (Scott Hazen Mueller)
- Reply-To: ames!FNALD.FNAL.GOV!DROEGE
- Organization: Sci.physics.fusion/Mail Gateway
- Date: Wed, 26 Aug 1992 19:57:32 GMT
- Lines: 59
-
- Barry Wise asks about point 8. As noted at the time, Jennifer turned on the
- heat between point 7 and point 8. That is she activated the controll that
- caused the furnace to perform a heating cycle. The weather has been strange.
- Jennifer turns on the heat more often, but it does not seem to affect the
- calorimeter. It just may not be possible to calibrate out the environment in
- a way that produces believeable data. We will try.
-
- Jed Rothwell says look for GEV level particles. Then he goes on to say:
-
- "Others have suggested that said GEV particles might easily be detected, or
- that they might cause obvious environmental damage, or other effects. I have
- talked to a number of high energy particle physicists and they say this is
- not the case."
-
- Who did you talk to Jed? Even money I know them, but more likely they know
- me if they are in high energy particle detection business. But I think you
- really got it completely wrong. Almost every known high energy physics
- detector will detect GEV level alpha particles. Note that Kamiokande surly
- detects such particles - but you are correct in saying that "even the
- Kamiokande CF experiment was not set up to detect such particles." They vetoe
- them out, that's why. But they would only have to look at their vetoe rate
- to detect them (but I am not an expert on the Kamiokande set up - it could
- be that it is hard to get at the right signal).
-
- Just to rub it in, I include a list of detectors you could use. Apologies to
- anyone's favorite detector that I have left out. The ? indicate it might be
- hard, and the * indicate that I am willing to call myself an expert on the
- detector type.
-
- Chrenkof detectors using photomultipliers or micro-channel plates.
- Gas Proportional Chambers
- *Magnetostrictive Spark Chambers
- Narrow Gap Spark Chambers
- Wide Gap Spark Chambers
- *Liquid Argon Detectors
- Liquid Xenon Detectors
- Plastic Scintillator with photomultiplier detection
- ?Plastic Scintillator with PIN Diode read out
- Bubble Chambers
- Ge Surface Barrier Detectors
- Si Strip Detectors
- NaI Scintillation Detectors
- ?CCD Arrays
- ?Ionization Chambers (may need high rate)
- Geiger Counters
- *Flash Tubes
- Drift Chambers
-
- One more "exotic" detector that even a computer programmer might know about
- is the computer memory chip. They are sensitive to alpha particles and must
- be made of low radiation emitters to prevent bit changes from alphas coming
- to rest at just the right spot in the chip. So Jed, if you notice while
- running your experiment that your computer "dies" with a parity error, you
- might have your "proof".
-
- I would sure like to know what "high energy particle physicsts" you talked to
- that said detecting GEV alphas was hard!
-
- Tom Droege
-