First test runs of a dark-matter detector with interleaved ionization electrodes and phonon sensors for surface-event rejection
✍ Scribed by P.L. Brink; B. Cabrera; J.P. Castle; J. Cooley; L. Novak; R.W. Ogburn; M. Pyle; J. Ruderman; A. Tomada; B.A. Young; J. Filippini; P. Meunier; N. Mirabolfathi; B. Sadoulet; D.N. Seitz; B. Serfass; K.M. Sundqvist; D.S. Akerib; C.N. Bailey; M.R. Dragowsky; D.R. Grant; R. Hennings-Yeomans; R.W. Schnee
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 318 KB
- Volume
- 559
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
To improve surface event rejection for the SuperCDMS experiment, we have designed, fabricated and tested a new detector concept where ionization electrodes are interleaved with phonon sensors on both sides of the detector. This i-(interleaved)-ZIP concept has electrical fields tangential to all detector surfaces. A surface event will produce an ionization signal in one charge read out channel, whereas an event within the bulk of the crystal will cause a signal in both charge read out channels. In addition, the symmetric phonon channels on both sides of the crystal, two semicircles on one side for x and two on the other for y, allow three-dimensional reconstruction of event locations through time delays and relative energy collection between the four phonon channels. Preliminary results from a 100 g Si prototype are presented.