IBIC2014 - List of Keywords (luminosity)

Paper	Title	Other Keywords	Page
MOPD03	Performance and Upgrade of the Fast Beam Condition Monitor at CMS	electron, background, electronics, laser	134
	M. Hempel, H.M. Henschel, O. Karacheban, W. Lange, J.L. Leonard, M. Penno DESY Zeuthen, Zeuthen, Germany K. Afanaciev NC PHEP BSU, Minsk, Belarus A.I. Bell DLS, Oxfordshire, United Kingdom P.R. Burtowy, A.E. Dabrowski, R. Loos, V. Ryjov, A.A. Zagozdzinska CERN, Geneva, Switzerland W. Lohmann BTU, Cottbus, Germany W. Lohmann, R. Walsh DESY, Hamburg, Germany B.L. Pollack NU, Evanston, Illinois, USA D. Przyborowski AGH, Cracow, Poland S. Schuwalow Uni HH, Hamburg, Germany D.P. Stickland PU, Princeton, New Jersey, USA
	The Fast Beam Condition Monitor BCM1F is a diamond based particle detector inside CMS. It is based on 8 single crystal CVD diamond sensors on both ends of the interaction point and is used for beam background and luminosity measurements. The system has been operated up to an integrated luminosity of 30fb-1, corresponding to a particle fluence of 8.78·10¹³ cm^-2 (24GeV proton equivalent). To maintain the performance at a bunch spacing of 25ns and at the enhanced luminosity after the LHC Long Shutdown LS1, an upgrade of BCM1F is necessary. The upgraded system features 24 single crystal diamond sensors with a two pad metallization, a very fast front-end ASIC built with 130nm CMOS technology and new back-end electronics. A prototype of the upgraded BCM1F components were studied in the 5GeV electron beam at DESY. Measurements were done on the signal shape as function of time, the collection efficiency as a function of voltage and position of the impact point on the sensor surface. The preliminary results of this testbeam will be presented. In addition, the status of the new upgraded BCM1F will be given.
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WEPF06	A New Integrating Current Transformer for the LHC	instrumentation, proton, resonance, operation	540
	L. Søby, D. Belohrad, M. Krupa, P. Odier CERN, Geneva, Switzerland J.F. Bergoz, F. Stulle BERGOZ Instrumentation, Saint Genis Pouilly, France
	The existing fast beam current transformers of the LHC have been shown to exhibit both bunch length and bunch position dependency. A new Integrating Current Transformer (ICT) have therefore been developed in collaboration with Bergoz Instrumentation to address these issues. As goals a 0.1 %/mm beam position dependency and 0.1 % bunch length dependency were specified, along with a bandwidth of 100 MHz. This paper describes the principles of ICT operation and presents the laboratory measurement results obtained with the first prototypes at CERN.
	Poster WEPF06 [2.286 MB]
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Paper

Title

Other Keywords

Page

MOPD03

Performance and Upgrade of the Fast Beam Condition Monitor at CMS

electron, background, electronics, laser

134

M. Hempel, H.M. Henschel, O. Karacheban, W. Lange, J.L. Leonard, M. Penno
DESY Zeuthen, Zeuthen, Germany
K. Afanaciev
NC PHEP BSU, Minsk, Belarus
A.I. Bell
DLS, Oxfordshire, United Kingdom
P.R. Burtowy, A.E. Dabrowski, R. Loos, V. Ryjov, A.A. Zagozdzinska
CERN, Geneva, Switzerland
W. Lohmann
BTU, Cottbus, Germany
W. Lohmann, R. Walsh
DESY, Hamburg, Germany
B.L. Pollack
NU, Evanston, Illinois, USA
D. Przyborowski
AGH, Cracow, Poland
S. Schuwalow
Uni HH, Hamburg, Germany
D.P. Stickland
PU, Princeton, New Jersey, USA

The Fast Beam Condition Monitor BCM1F is a diamond based particle detector inside CMS. It is based on 8 single crystal CVD diamond sensors on both ends of the interaction point and is used for beam background and luminosity measurements. The system has been operated up to an integrated luminosity of 30fb-1, corresponding to a particle fluence of 8.78·10¹³ cm^-2 (24GeV proton equivalent). To maintain the performance at a bunch spacing of 25ns and at the enhanced luminosity after the LHC Long Shutdown LS1, an upgrade of BCM1F is necessary. The upgraded system features 24 single crystal diamond sensors with a two pad metallization, a very fast front-end ASIC built with 130nm CMOS technology and new back-end electronics. A prototype of the upgraded BCM1F components were studied in the 5GeV electron beam at DESY. Measurements were done on the signal shape as function of time, the collection efficiency as a function of voltage and position of the impact point on the sensor surface. The preliminary results of this testbeam will be presented. In addition, the status of the new upgraded BCM1F will be given.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEPF06

A New Integrating Current Transformer for the LHC

instrumentation, proton, resonance, operation

540

L. Søby, D. Belohrad, M. Krupa, P. Odier
CERN, Geneva, Switzerland
J.F. Bergoz, F. Stulle
BERGOZ Instrumentation, Saint Genis Pouilly, France

The existing fast beam current transformers of the LHC have been shown to exhibit both bunch length and bunch position dependency. A new Integrating Current Transformer (ICT) have therefore been developed in collaboration with Bergoz Instrumentation to address these issues. As goals a 0.1 %/mm beam position dependency and 0.1 % bunch length dependency were specified, along with a bandwidth of 100 MHz. This paper describes the principles of ICT operation and presents the laboratory measurement results obtained with the first prototypes at CERN.

Poster WEPF06 [2.286 MB]

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)