Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development of the TIP-HOLE gas avalanche structure for nuclear
  physics/astrophysics applications with radioactive isotope beams: preliminary
  results   We discuss the operational principle and performance of new micro-pattern
gaseous detectors based on the multi-layer Thick Gaseous Electron Multiplier
(M-THGEM) concept coupled to a needle-like anode. The new gas avalanche
structure aims at high-gain operation in nuclear physics and nuclear
astrophysics applications with radioactive isotope beams. It is thereafter
named TIP-HOLE gas amplifier, and consists of a THGEM or a two-layers M-THGEM
mounted in a WELL configuration. The avalanche electrodes are collected by thin
conductive needles (with up to a few ten um radius and a height of 100 um),
located at the center of the hole and acting as point-like anode. The bottom
area of the needle may be surrounded by a cylindrical cathode strip in order to
increase the electron collection efficiency. The electric field lines from the
drift region above the M-THGEM are focused into the holes, and then forced to
converge on the needle tip. An extremely high field is reached at the top of
the needle, creating a point-like avalanche process. Stable, high-gain
operations in a wide range of pressures may be achieved at relatively low
operational voltage, even in pure quencher gas at atmospheric pressure (e.g.
pure isobutene). The TIP-HOLE structure may be produced by the innovative
scalable additive manufacturing technology for large-area, multiple-layer
printed circuit boards, recently developed by the UHV technology company (USA)
and discussed for the first time in this work.

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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
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The categories of this paper are: math
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph