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An electron transparent proton detector for neutron decay studies S. A. Hoedla
 

Summary: An electron transparent proton detector for neutron decay studies
S. A. Hoedla
and A. R. Youngb
Triangle University Nuclear Laboratory, Duke University, Durham, North Carolina 27708
H. Ade
Department of Physics, North Carolina State University, Raleigh, North Carolina 27695
A. Lozanoc
Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695
Received 21 October 2005; accepted 22 February 2006; published online 19 April 2006
We have developed an ultrathin 100 nm , very strong polyimide foil which can span more than
6 6 cm2
and is ideal for the fabrication of low energy proton detectors. We have produced a proton
detector geometry in which protons incident on the foil with kinetic energies greater than about
25 keV produce, on average, more than ten secondary electrons in a conversion crystal evaporated
on the back face of the foil. These secondary electrons can be "postaccelerated" and counted in a
variety of detectors. The polyimide foils are much more durable than carbon foils previously used
in similar detection geometries. LiF was chosen as the conversion crystal, which is relatively
insensitive to exposure to air, improving their secondary electron yield under typical operating
conditions. In addition, we describe the operation of a very simple, small scale proton accelerator
and detector testing chamber capable of providing up to 10 kHz of beam with energies between 10

  

Source: Ade, Harald W.- Department of Physics, North Carolina State University

 

Collections: Physics