Development of a $^{127}$Xe calibration source for nEXO
B. G. Lenardo, C. A. Hardy, R. H. M. Tsang, J. C. Nzobadila Ondze, A. Piepke, S. Triambak, A. Jamil, G. Adhikari, S. Al Kharusi, E. Angelico, I. J. Arnquist, V.… 展开作者
B. G. Lenardo, C. A. Hardy, R. H. M. Tsang, J. C. Nzobadila Ondze, A. Piepke, S. Triambak, A. Jamil, G. Adhikari, S. Al Kharusi, E. Angelico, I. J. Arnquist, V. Belov, E. P. Bernard, A. Bhat, T. Bhatta, A. Bolotnikov, P. A. Breur, J. P. Brodsky, E. Brown, T. Brunner, E. Caden, G. F. Cao, L. Cao, B. Chana, S. A. Charlebois, D. Chernyak, M. Chiu, J. R. Cohen, R. Collister, J. Dalmasson, T. Daniels, L. Darroch, R. DeVoe, M. L. di Vacri, Y. Y. Ding, M. J. Dolinski, J. Echevers, B. Eckert, M. Elbeltagi, L. Fabris, D. Fairbank, W. Fairbank, J. Farine, Y. S. Fu, G. Gallina, P. Gautam, G. Giacomini, W. Gillis, C. Gingras, R. Gornea, G. Gratta, K. Harouaka, M. Heffner, E. Hein, J. Hößl, A. House, A. Iverson, X. S. Jiang, A. Karelin, L. J. Kaufman, R. Krücken, A. Kuchenkov, K. S. Kumar, A. Larson, K. G. Leach, D. S. Leonard, G. Li, S. Li, Z. Li, C. Licciardi, R. Lindsay, R. MacLellan, J. Masbou, K. McMichael, M. Medina Peregrina, B. Mong, D. C. Moore, K. Murray, J. Nattress, C. R. Natzke, X. E. Ngwadla, K. Ni, Z. Ning, J. L. Orrell, G. S. Ortega, I. Ostrovskiy, C. T. Overman, A. Perna, T. Pinto Franco, A. Pocar, J. F. Pratte, N. Priel, E. Raguzin, G. J. Ramonnye, H. Rasiwala, K. Raymond, G. Richardson, M. Richman, J. Ringuette, P. C. Rowson, R. Saldanha, S. Sangiorgio, X. Shang, A. K. Soma, F. Spadoni, V. Stekhanov, X. L. Sun, S. Thibado, A. Tidball, J. Todd, T. Totev, O. A. Tyuka, F. Vachon, V. Veeraraghavan, S. Viel, K. Wamba, Y. Wang, Q. Wang, W. Wei, L. J. Wen, U. Wichoski, S. Wilde, W. H. Wu, W. Yan, L. Yang, O. Zeldovich, J. Zhao, T. Ziegler
We study a possible calibration technique for the nEXO experiment using a $^{127}$Xe electron capture source. nEXO is a next-generation search for neutrinoless double beta decay ($0νββ$) that will use a 5-tonne, monolithic liquid xenon time projection chamber (TPC). The xenon, used both as source and detection medium, will be enriched to 90% in $^{136}$Xe. To optimize the event reconstruction and energy resolution, calibrations are needed to map the position- and time-dependent detector response. The 36.3 day half-life of $^{127}$Xe and its small $Q$-value compared to that of $^{136}$Xe $0νββ$ would allow a small activity to be maintained continuously in the detector during normal operations without introducing additional backgrounds, thereby enabling in-situ calibration and monitoring of the detector response. In this work we describe a process for producing the source and preliminary experimental tests. We then use simulations to project the precision with which such a source could calibrate spatial corrections to the light and charge response of the nEXO TPC.
Experimental updates on development of accelerator-driven ion source at TRIUMF to benchmark Ba-tagging techniques for future neutrinoless double beta decay searches
TRIUMF（特柳姆夫国家粒子加速器中心）；Department of Physics and Astronomy, McMaster University（麦克马斯特大学物理与天文系）；Department of Physics and Physical Oceanography, University of North Carolina at Wilmington（北卡罗来纳大学威尔明顿分校物理与物理海洋学系）；Department of Physics, McGill University（麦吉尔大学物理系）；Department of Physics and Astronomy, University of Victoria（维多利亚大学物理与天文系）
Online Calibration of the TPC Drift Time in the ALICE High Level Trigger
大型离子对撞机实验（英语：Large Ion Collider Experiment）是欧洲核子研究中心大型强子对撞机（LHC）的四个主要实验之一。高级触发器（HLT）是一个计算集群，它实时重建ALICE检测器记录的冲突。它采用自定义的在线数据传输框架在计算节点之间分配数据和工作负载。ALICE采用对诸如压力和温度的环境条件敏感的子检测器，例如时间投影室（TPC）。粒子轨迹的精确重建需要这些探测器的校准。在HLT中实时执行校准改进了在线重建，并使某些离线校准步骤过时，从而加速了离线物理分析。对于LHC Run 3，从2020年开始，数据简化将依赖于重建数据，在线校准成为必要。重建的粒子轨迹建立了校准的基础，使快速在线跟踪成为强制性的。用于此目的的主要探测器是TPC和ITS（内部跟踪系统）。在TPC中重建轨迹是计算最密集的步骤。我们提出了几个改进的ALICE高电平触发器，以方便在线校准。在线校准的主要新开发是一个包装器，可以在HLT内运行ALICE离线分析和校准任务。除此之外，我们还添加了异步处理功能，以支持HLT框架中长时间运行的校准任务，否则将以事件同步方式运行。为了提高弹性，隔离进程执行异步操作，使得即使是致命错误也不会干扰数据获取。我们用ZeroMQ数据传输组件补充了原始的无循环HLT链。[...]
Development of a Temperature-Variable Cold Blackbody Calibrator for Millimeter and Submillimeter Wave Detectors
National Astronomical Observatory of Japan (NAOJ)（日本国立天文台）；Graduate University for Advanced Studies (SOKENDAI)（综合研究大学院大学）；Saitama University（埼玉大学）；University of Tokyo（东京大学）；RIKEN Center for Advanced Photonics（理化学研究所先进光子学中心）；Kitami Institute of Technology（北见工业大学）
