Prototype AT-TPC: Toward a new generation active target time projection chamber for radioactive beam experiments

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• 作者：D. Suzuki ; M. Ford ; D. Bazin ; W. Mittig ; W.G. Lynch ; T. Ahn ; S. Aune ; E. Galyaev ; A. Fritsch ; J. Gilbert ; F. Montes ; A. Shore ; J. Yurkon ; J.J. Kolata ; J. Browne ; A. Howard ; A.L. Roberts ; X.D. Tang
• 关键词：Time projection chamber ; Active target ; Radioactive isotope beam ; Micromegas bulk ; High voltage insulation ; Helium gas
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2012
• 出版时间：1 November, 2012
• 年：2012
• 卷：691
• 期：Complete
• 页码：39-54
• 全文大小：2445 K

文摘

The Prototype AT-TPC, a detector based on time projection chamber (TPC) technology was built at the National Superconducting Cyclotron Laboratory, Michigan State University. The chamber gas, called the active target, of the Prototype AT-TPC is utilized simultaneously as a reaction target and a tracking medium of charged particles for measuring low-energy nuclear reactions. In pursuit of luminosity, efficiency and resolution for reaction studies at a new generation of radioactive isotope facilities, the Prototype AT-TPC provides one of the largest active volumes in the world measuring 25 cm in diameter and 50 cm long along the beam axis, millimeter-precision tracking capability, and a high electric field of 1 kV/cm/atm for fast electron drift, which limits the detector dead time. Commissioning of the detector using standard alpha sources and radioactive ⁶He beams has demonstrated the detector's long-term stability as well as its performance, which allowed good reconstruction of reaction kinematics.