Difference between revisions of "Summer 2010 Projects"

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 == Summer 2010 Projects ==
-=== 11C Identification and Measurement ===
-Use 2 2" Sodium Iodide detectors. Manuafacturer is Bicron, now part of [http://www.detectors.saint-gobain.com/ Saint-Gobain]
-These detectors have thin, havar windows because they were originally intended to measure light charged particles (proton, deuteron, triton, alpha) in light fusion reactions [http://prc.aps.org/abstract/PRC/v39/i1/p128_1 Paper from 1986]
-NaI was one of the first inorganic scintillators discovered (reference) and is still widely used for x-ray and gamma ray detection. It has good "stopping power" or long "radiation length", ie, good ability to stop photons. The energy resolution is poor compared to CsI or BaF2 and is not even in the same league as HPGe. However, it is better than most organic scintillators.
-The NaI scintillates in the (blue/uv/don't remember) and so is coupled to a photomultiplier with a (don't know) window. The PMT acts to increase convert the scintillation light into electrons then multiply the electron current until it is large enough for us to amplify or observe.
-PMT
-Tube BAse, Anode, dynode outs (these also have connections for Peltier Coolers [http://en.wikipedia.org/wiki/Thermoelectric_cooling  Do NOt follow this link!!!]
-NIM Bin
-HV Power supply for Tube Base
-Spectroscopy Amplifier, Unipolar  + Bipolar outs, concept of GAin
-Discriminator, CFD
-Coincidence, Counter Timer

Revision as of 09:20, 27 August 2010