Aspen Workshop on CRP, 15- 19 Apr 2007 W.C. Turner – The LHCf Experiment 1 LHCf LHCf - an experiment for measuring the very forward production of neutral particles at the LHC W.C. Turner LBNL for the LHCf Collaboration Presented at the Aspen Workshop on Cosmic Rays 15-19 Apr 2007
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LHCf Aspen Workshop on CRP, 15-19 Apr 2007 W.C. Turner – The LHCf Experiment1 LHCf - an experiment for measuring the very forward production of neutral.
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Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 1
LHCf
LHCf - an experiment for measuring the very forward
production of neutral particles at the LHC
W.C. Turner
LBNL
for
the LHCf Collaboration
Presented at the Aspen Workshop on Cosmic Rays
15-19 Apr 2007
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 2
LHCf
The LHCf Participants
Nagoya University, Japan
K. Fukui, Y. Itow, T. Mase, K. Masuda, Y. Matsubara, H. Matsumoto, H. Menjo,
T. Sako, K. Taki, H. Watanabe
Kanagawa University, Japan
T. Tamura
Konan University
Y. Muraki (Spokesperson),
Waseda University, Japan
K. Kasahara, Y. Shimizu, S. Torii
Shibaura Inst. of Tech., Japan
K. Yoshida
University of Florence, Italy
O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, P. Papini
University of Catina, Italy
A. Tricomi
Univerity of Valencia, Spain
A, Faus-Golffe, J. Valesco
CERN, Switzerland
D. Macina, A.-L. Perrot
Ecole-Polytechnique Palaiseau, France
M. Hauguenauer
Lawrence Berkeley Laboratory, USA
W.C. Turner
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 3
LHCf
Outline
• Motivation and History of LHCf
• The LHC Environment
• The LHCf Detectors
• Anticipated LHCf Performance
• SPS Beam Test and Monte Carlo Results
• Installation and Schedule
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 4
LHCf
Motivation and History
• Use 7+7 TeV pp collisions to benchmark neutral particle production cross sections at 1017eV laboratory equivalent energy– Useful for cosmic ray simulations, contribute to resolution of super
GZK and composition questions
• Previous experiment UA7 performed at SPPS 400 + 400 GeV, 1014 eV (E. Pare et al, Phys. Lett., B242 (1990))
• Present Experiment LOI submitted to LHCC in May 2004 and TDR approved in 2006
• Prototype detector tested at SPS H4 in 2004 and final detector in 2006
• First detector installed at IP1 in Jan 2007
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 5
LHCf The LHCf detectors are located +/-140m from IP1 in LHC
IP1, ATLAS, LHCf
IP5, CMS
IP2, ALICE IP8, LHCb
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 6
LHCf
Interaction region
• The TAN absorbs forward neutral collision products (mostly neutrons and photons) and is placed in front of the outer beam separation dipole D2 to protect superconducting magnets • LHCf exploits the opportunity to install detectors inside the TAN for measurement of very forward neutral particle production cross sections
TAN neutral particle absorber
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 7
LHCf
Exploded view of the TAN and transition beam tube
IP, +140m
Instrumentation slot (96mm x 60.7mm x 1000mm)
~ 5m
Aspen Workshop on CRP, 15-19 Apr 2007
W.C. Turner – The LHCf Experiment 8
LHCf
• Measure 100 GeV - 7 TeV gammas and neutrons
• Detectors are located on both sides of IP1 (Arm#1 and Arm#2) for coincidence studies and redundancy
• Each Arm consists of two “tower” calorimeters for separately measuring the two gammas from 0 decay
- 44 radiation lengths of W plates interleaved with 16 scintillation panels (overall length 25cm)- Transverse cross sections 20mm x 20mm + 40mm x 40mm Arm#1 and 25mm x 25mm + 32mm x 32mm Arm#2
• Four position sensitive layers measure the transverse center of the showers