An Electromagnetic Calorimeter for the JLab Real Compton Scattering Experiment
D. J. Hamilton, A. Shahinyan, B. Wojtsekhowski, J. R. M. Annand, T. -H. Chang, E. Chudakov, A. Danagoulian, P. Degtyarenko, K. Egiyan, R. Gilman, V. Gorbenko, J… 展开作者
D. J. Hamilton, A. Shahinyan, B. Wojtsekhowski, J. R. M. Annand, T. -H. Chang, E. Chudakov, A. Danagoulian, P. Degtyarenko, K. Egiyan, R. Gilman, V. Gorbenko, J. Hines, E. Hovhannisyan, C. E. Hyde-Wright, C. W. de Jager, A. Ketikyan, V. H. Mamyan, R. Michaels, A. M. Nathan, V. Nelyubin, I. Rachek, M. Roedelbrom, A. Petrosyan, R. Pomatsalyuk, V. Popov, J. Segal, Y. Shestakov, J. Templon, H. Voskanyan
备注:
text updated according to published version
发表信息:
Nuclear Instruments and Methods A, Volume 643, Issue 1, 1 July 2011, Pages 17-28
A lead-glass hodoscope calorimeter that was constructed for use in the Jefferson Lab Real Compton Scattering experiment is described. The detector provides a measurement of the coordinates and the energy of scattered photons in the GeV energy range with resolutions of 5 mm and 6%/\sqrt(Eγ [GeV]). Features of both the detector design and its performance in the high luminosity environment during the experiment are presented.
Commissioning of the large-scale lead tungstate scintillating calorimeter
Thomas Jefferson National Accelerator Facility(托马斯·杰斐逊国家加速器设施);University of North Carolina at Wilmington(北卡罗来纳大学温斯顿-塞勒姆分校);A. I. Alikhanian National Science Laboratory (Yerevan Physics Institute)(A.I.阿利哈尼扬国家科学实验室(埃里温物理研究所))
Low-Energy Calibration of SuperCDMS HVeV Cryogenic Silicon Calorimeters Using Compton Steps
University of British Columbia(不列颠哥伦比亚大学);University of Toronto(多伦多大学);Durham University(杜伦大学);SLAC National Accelerator Laboratory(斯坦福直线加速器中心);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所);Northeastern University(东北大学);Mitchell Institute for Fundamental Physics and Astronomy(米歇尔基础物理与天文学研究所);University of Florida(佛罗里达大学);Pacific Northwest National Laboratory(太平洋西北国家实验室);Stanford University(斯坦福大学);Southern Methodist University(南方卫理公会大学);University of California, Berkeley(加州大学伯克利分校);National Institute of Science Education and Research(国家科学教育与研究学院);Homi Bhabha National Institute(霍米·巴巴国家研究所);Northwestern University(西北大学);South Dakota School of Mines and Technology(南达科他矿业理工学院);SNOLAB(萨诺实验室);University of Minnesota(明尼苏达大学);Queen's University(女王大学);University of South Dakota(南达科他大学);University of Colorado Denver(科罗拉多大学丹佛分校);Zayed University(扎耶德大学);California Institute of Technology(加州理工学院);Laurentian University(劳伦森大学);Fermi National Accelerator Laboratory(费米国家加速器实验室);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);Institute for Astroparticle Physics(天体粒子物理研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
Calorimeter-less gamma-ray telescopes: Optimal measurement of charged particle momentum from multiple scattering by Bayesian analysis of Kalman filtering innovations
重光子搜索(HPS)是一项在固定目标电产生中搜索隐藏扇区光子的实验,正准备于2014年秋季在托马斯杰斐逊国家加速器设施(JLab)安装。作为该项目的第一阶段,HPS测试运行装置于2012年建成并运行,以证明实验的技术可行性,并确认触发率和占用率符合预期。本文介绍了HPS试车装置和读出电子学及其性能。在这种情况下,重光子可以被识别为e $^+$ e $^-$不变质谱中的窄峰,在三叉戟背景之上,或者作为具有从产生目标移位的衰变顶点的窄不变质量峰,因此需要带电粒子跟踪和顶点来检测它。在HPS测试运行中,带电粒子是用偶极磁铁内的紧凑型前向硅微带跟踪器测量的。电磁簇射在位于磁体后面的PbW 0 $_{4}$晶体量热计中检测到,并用于触发实验和识别电子和正电子。两个探测器都靠近光束线放置,并从上到下分开。这种布置提供了对低质量重光子的灵敏度,允许未散射的束的清晰通过,并且避免了来自靶的退化电子的喷射。即时和位移的e $^+$ e $^-$对之间的区分需要将第一层硅传感器放置在目标下游仅10 cm处。预期的信号很小,而三叉戟背景很大,因此实验需要非常大的统计数据。因此,HPS测试运行利用高速读出和数据采集电子设备以及快速触发器,以利用JLab的CEBAF加速器的基本100%占空比。