Advanced

The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS

Avoni, G.; Bruschi, M.; Cabras, G.; Caforio, D.; Dehghanian, N.; Floderus, A. LU ; Giacobbe, B.; Giannuzzi, F.; Giorgi, F. and Grafström, P., et al. (2018) In Journal of Instrumentation 13(7).
Abstract

The ATLAS luminosity monitor, LUCID (LUminosity Cherenkov Integrating Detector), had to be upgraded for the second run of the LHC accelerator that started in spring 2015. The increased energy of the proton beams and the higher luminosity required a redesign of LUCID to cope with the more demanding conditions. The novelty of the LUCID-2 detector is that it uses the thin quartz windows of photomultipliers as Cherenkov medium and a small amounts of radioactive 207Bi sources deposited on to these windows to monitor the gain stability of the photomultipliers. The result is a fast and accurate luminosity determination that can be kept stable during many months of data taking. LUCID-2 can also measure the luminosity accurately... (More)

The ATLAS luminosity monitor, LUCID (LUminosity Cherenkov Integrating Detector), had to be upgraded for the second run of the LHC accelerator that started in spring 2015. The increased energy of the proton beams and the higher luminosity required a redesign of LUCID to cope with the more demanding conditions. The novelty of the LUCID-2 detector is that it uses the thin quartz windows of photomultipliers as Cherenkov medium and a small amounts of radioactive 207Bi sources deposited on to these windows to monitor the gain stability of the photomultipliers. The result is a fast and accurate luminosity determination that can be kept stable during many months of data taking. LUCID-2 can also measure the luminosity accurately online for each of the up to 2808 colliding bunch pairs in the LHC . These bunch pairs are separated by only 25 ns and new electronics has been built that can count not only the number of pulses above threshold but also integrate the pulses.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cherenkov detectors; Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others)
in
Journal of Instrumentation
volume
13
issue
7
publisher
IOP Publishing
external identifiers
  • scopus:85051513709
ISSN
1748-0221
DOI
10.1088/1748-0221/13/07/P07017
language
English
LU publication?
yes
id
2d10f8f6-220b-4152-8ef0-7ef42071f534
date added to LUP
2018-09-11 13:34:13
date last changed
2019-05-21 04:10:54
@article{2d10f8f6-220b-4152-8ef0-7ef42071f534,
  abstract     = {<p>The ATLAS luminosity monitor, LUCID (LUminosity Cherenkov Integrating Detector), had to be upgraded for the second run of the LHC accelerator that started in spring 2015. The increased energy of the proton beams and the higher luminosity required a redesign of LUCID to cope with the more demanding conditions. The novelty of the LUCID-2 detector is that it uses the thin quartz windows of photomultipliers as Cherenkov medium and a small amounts of radioactive <sup>207</sup>Bi sources deposited on to these windows to monitor the gain stability of the photomultipliers. The result is a fast and accurate luminosity determination that can be kept stable during many months of data taking. LUCID-2 can also measure the luminosity accurately online for each of the up to 2808 colliding bunch pairs in the LHC . These bunch pairs are separated by only 25 ns and new electronics has been built that can count not only the number of pulses above threshold but also integrate the pulses.</p>},
  articleno    = {P07017},
  author       = {Avoni, G. and Bruschi, M. and Cabras, G. and Caforio, D. and Dehghanian, N. and Floderus, A. and Giacobbe, B. and Giannuzzi, F. and Giorgi, F. and Grafström, P. and Hedberg, V. and Manghi, F. Lasagni and Meneghini, S. and Pinfold, J. and Richards, E. and Sbarra, C. and Cesari, N. Semprini and Sbrizzi, A. and Soluk, R. and Ucchielli, G. and Valentinetti, S. and Viazlo, O. and Villa, M. and Vittori, C. and Vuillermet, R. and Zoccoli, A.},
  issn         = {1748-0221},
  keyword      = {Cherenkov detectors; Photon detectors for UV,visible and IR photons (vacuum) (photomultipliers, HPDs, others)},
  language     = {eng},
  month        = {07},
  number       = {7},
  publisher    = {IOP Publishing},
  series       = {Journal of Instrumentation},
  title        = {The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS},
  url          = {http://dx.doi.org/10.1088/1748-0221/13/07/P07017},
  volume       = {13},
  year         = {2018},
}