Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimization of NSLS-II Blade X-ray Beam Position Monitors: from
  Photoemission type to Diamond Detector   Optimization of blade type X-ray Beam Position Monitors (XBPM) was performed
for NSLS-II undulator IVU20. Blade material, configuration and operation
principle was analyzed to improve XBPM performance. Optimization is based on
calculation of the XBPM signal spatial distribution. Along with standard
photoemission blades, Diamond Detector Blade (DDB) was analyzed as XBPM signal
source. Analyses revealed, that Diamond Detector Blade XBPM would allow
overcoming drawbacks of the photoemission type XBPMs.

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The categories of this paper are: econ
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The categories of this paper are: nlin
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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: hep-ex
2
The categories of this paper are: math
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The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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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: nucl-th
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The categories of this paper are: nucl-ex