Collector-based measurement of gas desorption and secondary electron emission induced by 0–1.4 keV electrons from LHC-grade copper at 15 K
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00360277" target="_blank" >RIV/68407700:21220/22:00360277 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.nimb.2022.09.013" target="_blank" >https://doi.org/10.1016/j.nimb.2022.09.013</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nimb.2022.09.013" target="_blank" >10.1016/j.nimb.2022.09.013</a>
Alternative languages
Result language
angličtina
Original language name
Collector-based measurement of gas desorption and secondary electron emission induced by 0–1.4 keV electrons from LHC-grade copper at 15 K
Original language description
CERN’s Large Hadron Collider cryomagnets embed a 1.9 K UHV chamber lined with a 5 - 20 K beam-screen (BS) that intercepts the synchrotron radiation and electron cloud (EC). The low–energy EC irradiates the BS and desorbs gas, creating a dynamic vacuum effect. A novel setup controllably reproduces this by irradiating an unbaked as-received BS copper sample at 15 K with 0 - 1.4 keV electrons, representing a slice of the EC spectrum. This collector-based setup is qualified using a HOPG reference for secondary electron yield (SEY) and 15N2 as a tracer in low-energy electron stimulated desorption (ESD) measurements. Measurement at 15 K revealed sub-10 eV ESD thresholds and a maximum around 300 eV of 0.18 H2/e- and 0.13 CO/e-. Irradiation with 300 eV and 1 keV electrons at ~ 8.10-4 C.mm-2 conditioned ESD and SEY alike. Similar dose at 17 eV only caused minor SEY reduction and no ESD decline. The as-received H2 and CO2 yields at 300 eV decreased 5 - 150x between 15 and 265 K, respectively.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Instruments and Methods in Physics Research, Section B, Beam Interactions with Materials and Atoms
ISSN
0168-583X
e-ISSN
1872-9584
Volume of the periodical
531
Issue of the periodical within the volume
november
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
34-43
UT code for WoS article
000868577600004
EID of the result in the Scopus database
2-s2.0-85139018510