Remark on a promising design of the fissionTPC cathode

2021 ◽  
Vol 16 (12) ◽  
pp. T12004
Author(s):  
J.Q. Fu
Keyword(s):  
Cross Section ◽  
Fission Fragment ◽  
Rise Time ◽  
Time Projection Chamber ◽  
Signal To Noise Ratio ◽  
Short Note ◽  
Signal To Noise ◽  
Cathode Structure ◽  
Induced Fission ◽  
Time Projection

Abstract The fission Time Projection Chamber (fissionTPC) has been designed and built to make precision cross-section measurements of neutron-induced fission by the NIFFTE Collaboration. The signal of the cathode is implemented as trigger for the fissionTPC that rejects alpha signal as background and selects only fission fragment signal to be recorded. This short note is devoted to a discussion of a promising way to improve the cathode signal performance by segmenting the planar cathode into two parts. It is shown through analytic calculations that the new cathode structure has better signal-to-noise ratio and faster rise time.

scholarly journals Fission fragment angular anisotropy in neutron-induced fission of U235 measured with a time projection chamber

2019 ◽  
Vol 99 (6) ◽  
Author(s):  
V. Geppert-Kleinrath ◽  
F. Tovesson ◽  
J. S. Barrett ◽  
N. S. Bowden ◽  
J. Bundgaard ◽  
...  
Keyword(s):  
Fission Fragment ◽  
Time Projection Chamber ◽  
Angular Anisotropy ◽  
Induced Fission ◽  
Time Projection

scholarly journals Measurement of the 239Pu(n,f)/235U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

2021 ◽  
Vol 178 ◽  
pp. 1-40
Author(s):  
L. Snyder ◽  
M. Anastasiou ◽  
N.S. Bowden ◽  
J. Bundgaard ◽  
R.J. Casperson ◽  
...  
Keyword(s):  
Cross Section ◽  
Time Projection Chamber ◽  
Cross Section Ratio ◽  
Section Ratio ◽  
Time Projection

Blind Deconvolution of SEM Images

2007 ◽  
Author(s):  
William E. Vanderlinde ◽  
James N. Caron
Keyword(s):  
Cross Section ◽  
Integrated Circuit ◽  
Blind Deconvolution ◽  
Signal To Noise Ratio ◽  
Image Resolution ◽  
Reference Standard ◽  
Signal To Noise ◽  
Sem Images ◽  
Resolution Improvement ◽  
Deconvolution Techniques

Abstract Blind deconvolution techniques were used to enhance scanning electron microscope (SEM) images in the range of 200,000x to 500,000x magnification. Typical SEM samples were imaged including a gold island reference standard, a plasma delayered integrated circuit, and an integrated circuit cross section. Image resolution improvement up to 40% was observed. However, it was necessary to use 16-bit TIFF images with greater than 120:1 signal to noise ratio, which required 10 minute frame times.

A Time Projection Chamber for Precision [sup 239]Pu(n,f) Cross Section Measurement

2008 ◽  
Author(s):  
M. Heffner ◽  
Jutta Escher ◽  
Frank S. Dietrich ◽  
Toshihiko Kawano ◽  
Ian J. Thompson
Keyword(s):  
Cross Section ◽  
Time Projection Chamber ◽  
Cross Section Measurement ◽  
Section Measurement ◽  
Time Projection

scholarly journals Direction-sensitive dark matter search with a low-background gaseous detector NEWAGE-0.3b”

2021 ◽  
Author(s):  
Tomonori Ikeda ◽  
Kiseki Nakamura ◽  
Takuya Shimada ◽  
Ryota Yakabe ◽  
Takashi Hashimoto ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Confidence Level ◽  
Energy Region ◽  
Time Projection Chamber ◽  
Emission Rate ◽  
Dark Matter Search ◽  
Low Background ◽  
Upper Limit ◽  
Time Projection

Abstract NEWAGE is a direction-sensitive dark matter search using a low-pressure gaseous time projection chamber. A low alpha-ray emission rate micro pixel chamber had been developed in order to reduce background for dark matter search. We conducted the dark matter search at the Kamioka Observatory in 2018. The total live time was 107.6 days corresponding to an exposure of 1.1 kg⋅days. Two events remained in the energy region of 50-60 keV which was consistent with 2.5 events of the expected background. A directional analysis was carried out and no significant forward-backward asymmetry derived from the WIMP-nucleus elastic scatterings was found. Thus a 90% confidence level upper limit on Spin-Dependent WIMP-proton cross section of 50 pb for a WIMP mass of 100 GeV/c2 was derived. This limit is the most stringent yet obtained from direction-sensitive dark matter search experiments.

Sign in / Sign up

Export Citation Format

Share Document