Contribution to a conference proceedings/Journal Article

PUBDB-2025-00310

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The CMS Fast Beam Condition Monitor for HL-LHC

Auzinger, G. ; Bakhshiansohi, H.Extern* ; Dabrowski, A. ; Delannoy, A. G. (Corresponding author) ; Dierlamm, A. ; Dragicevic, M. ; Gholami, A. ; Gomez, G. ; Guthoff, M.DESY* ; Haranko, M.Extern* ; Homna, A. ; Jenihhin, M. ; Kaplon, J. ; Karacheban, O. (Corresponding author)Extern* ; Korcsmáros, B. ; Liu, W. H. ; Lokhovitskiy, A. ; Loos, R. ; Mallows, S. ; Michel, J. ; Myronenko, V.Extern* ; Pásztor, G. ; Pari, M. ; Schwandt, J. ; Sedghi, M. ; Shevelev, A. ; Shibin, K. ; Steinbrueck, G.Extern* ; Stickland, D. ; Ujvari, B. ; Wegrzyn, G. J.

2024
Inst. of Physics London

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Please use a persistent id in citations: doi:10.1088/1748-0221/19/03/C03048  doi:10.3204/PUBDB-2025-00310

Report No.: arXiv:2402.03971

Abstract: The high-luminosity upgrade of the LHC brings unprecedented requirements for real-time andprecision bunch-by-bunch online luminosity measurement and beam-induced background monitoring. Akey component of the CMS Beam Radiation, Instrumentation and Luminosity system is a stand-aloneluminometer, the Fast Beam Condition Monitor (FBCM), which is fully independent from the CMScentral trigger and data acquisition services and able to operate at all times with a triggerlessreadout. FBCM utilizes a dedicated front-end application-specific integrated circuit (ASIC) toamplify the signals from CO$_{2}$-cooled silicon-pad sensors with a timing resolution of a fewnanoseconds, which enables the measurement of the beam-induced background. FBCM uses a modulardesign with two half-disks of twelve modules at each end of CMS, with four service modules placedclose to the outer edge to reduce radiation-induced aging. The electronics system design adaptsseveral components from the CMS Tracker for power, control and read-out functionalities. Thededicated FBCM23 ASIC contains six channels and adjustable shaping time to optimize the noise withregards to sensor leakage current. Each ASIC channel outputs a single binary high-speedasynchronous signal carrying time-of-arrival and time-over-threshold information. The chip outputsignal is digitized,encoded, and sent via a radiation-hard gigabit transceiverand an optical linkto the back-end electronics for analysis. This paper reports on the updated design of the FBCMdetector and the ongoing testing program.

Keyword(s): luminosity: monitoring ; radiation: damage ; CMS: upgrade ; integrated circuit: design ; background: induced ; electronics: design ; electronics: readout ; noise ; data acquisition ; time resolution ; semiconductor detector ; Si microstrip and pad detectors ; Radiation-hard detectors

Note: 16th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD23) 2023 Sept 25-29 Siena, Italy

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Contributing Institute(s):

1. LHC/CMS Experiment (CMS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Auzinger, G. ; Bakhshiansohi, H.Extern* ; Dabrowski, A. ; Delannoy, A. G. (Corresponding author) ; Dierlamm, A. ; Dragicevic, M. ; Gholami, A. ; Gomez, G. ; Guthoff, M.DESY* ; Haranko, M.Extern* ; Homna, A. ; Jenihhin, M. ; Kaplon, J. ; Karacheban, O. (Corresponding author)Extern* ; Korcsmáros, B. ; Liu, W. H. ; Lokhovitskiy, A. ; Loos, R. ; Mallows, S. ; Michel, J. ; Myronenko, V.Extern* ; Pásztor, G. ; Pari, M. ; Schwandt, J. ; Sedghi, M. ; Shevelev, A. ; Shibin, K. ; Steinbrueck, G.Extern* ; Stickland, D. ; Ujvari, B. ; Wegrzyn, G. J.
The CMS Fast Beam Condition Monitor for HL-LHC
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