The LHCf detector at the CERN Large Hadron Collider
The LHCf detector at the CERN Large Hadron Collider
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DOI：
10.1088/1748-0221/3/08/s08006
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发表时间：
2008-08
影响因子：
1.3
通讯作者：
O. Adriani;L. Bonechi;M. Bongi;G. Castellini;R. D’Alessandro;D. A. Faus;K. Fukui;M. Grandi;M. Haguenauer;Y. Itow;K. Kasahara;D. Macina;T. Mase;K. Masuda;Y. Matsubara;H. Menjo;M. Mizuishi;Y. Muraki;P. Papini;A. Perrot;S. Ricciarini;T. Sako;Y. Shimizu;K. Taki;T. Tamura;S. Torii;A. Tricomi;W. Turner;J. Velasco;A. Viciani;H. Watanabe;K. Yoshida
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文献类型：
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作者：
O. Adriani;L. Bonechi;M. Bongi;G. Castellini;R. D’Alessandro;D. A. Faus;K. Fukui;M. Grandi;M. Haguenauer;Y. Itow;K. Kasahara;D. Macina;T. Mase;K. Masuda;Y. Matsubara;H. Menjo;M. Mizuishi;Y. Muraki;P. Papini;A. Perrot;S. Ricciarini;T. Sako;Y. Shimizu;K. Taki;T. Tamura;S. Torii;A. Tricomi;W. Turner;J. Velasco;A. Viciani;H. Watanabe;K. Yoshida
LHCF是一个致力于测量大型强子对撞机碰撞最前沿区域发射的中性粒子的实验。物理目标是为校准用于研究超高能宇宙线的强子相互作用模型提供数据。这是可能的，因为大型强子对撞机的实验室当量碰撞能为1017 eV。两个LHCF探测器，包括由钨板制成的成像量热计、塑料闪烁体和位置敏感传感器组成，安装在距离相互作用点(IP)±140m的零度碰撞角处。虽然这些量能器的横向尺寸非常紧凑，从20 mm×20 mm到40 mm×40 mm，但对于能量从100GeV到7TeV的γ射线，能量分辨率有望优于6%，位置分辨率优于0.2 mm。CERN SPS的测试束结果证实了这一点。这些量热计可以测量η>；8.4中准快度范围内发射的粒子。探测器、数据采集和电子学在大型强子对撞机调试的早期阶段进行了优化，光度低于1030 cm-2 S-1。LHCF有望在光度为1029 cm-2 S-1的情况下，在运行一周左右的时间内获得与主要强子相互作用模型进行比较的数据。在发光度~1029 cm~(-2)S~(-1)下工作10天后，由于辐射损伤，塑料闪烁体的光输出预计将下降~10%。将通过使用来自激光器的校准脉冲来监测和校正这种退化。
LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating the hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. This is possible since the laboratory equivalent collision energy of LHC is 1017 eV. Two LHCf detectors, consisting of imaging calorimeters made of tungsten plates, plastic scintillator and position sensitive sensors, are installed at zero degree collision angle ±140 m from an interaction point (IP). Although the lateral dimensions of these calorimeters are very compact, ranging from 20 mm × 20 mm to 40 mm × 40 mm, the energy resolution is expected to be better than 6% and the position resolution better than 0.2 mm for γ-rays with energy from 100 GeV to 7 TeV. This has been confirmed by test beam results at the CERN SPS. These calorimeters can measure particles emitted in the pseudo rapidity range η > 8.4. Detectors, data acquisition and electronics are optimized to operate during the early phase of the LHC commissioning with luminosity below 1030 cm-2 s-1. LHCf is expected to obtain data to compare with the major hadron interaction models within a week or so of operation at luminosity ~ 1029 cm-2 s-1. After ~ 10 days of operation at luminosity ~ 1029 cm-2 s-1, the light output of the plastic scintillators is expected to degrade by ~ 10% due to radiation damage. This degradation will be monitored and corrected for using calibration pulses from a laser.