Design Considerations for Large Mass Ultra-Low Background Experiments

Aguayo Navarrete, Estanislao ; Reid, Douglas J. ; Fast, James E. ; Orrell, John L.

Pacific Northwest National Laboratory (U.S.)

关键词: Shielding;    Daq Data Acquisition;    72 Physics Of Elementary Particles And Fields;    1Tge One-Tonne 76Ge Neutrinoless Double Beta-Decay Experiment;    Fea Finite Element Analysis;   

DOI  :  10.2172/1021284
RP-ID  :  PNNL-20578
RP-ID  :  AC05-76RL01830
RP-ID  :  1021284

美国|英语

来源: UNT Digital Library

【 摘 要 】

Summary The objective of this document is to present the designers of the next generation of large-mass, ultra-low background experiments with lessons learned and design strategies from previous experimental work. Design issues divided by topic into mechanical, thermal and electrical requirements are addressed. Large mass low-background experiments have been recognized by the scientific community as appropriate tools to aid in the refinement of the standard model. The design of these experiments is very costly and a rigorous engineering review is required for their success. The extreme conditions that the components of the experiment must withstand (heavy shielding, vacuum/pressure and temperature gradients), in combination with unprecedented noise levels, necessitate engineering guidance to support quality construction and safe operating conditions. Physical properties and analytical results of typical construction materials are presented. Design considerations for achieving ultra-low-noise data acquisition systems are addressed. Five large-mass, low-background conceptual designs for the one-tonne scale germanium experiment are proposed and analyzed. The result is a series of recommendations for future experiments engineering and for the Majorana simulation task group to evaluate the different design approaches.