Aging studies for the large honeycomb drift tube system of the Outer Tracker of HERA-B

作者：Albrecht H; Bauer TS; Beck M; Belkov A; Berkhan K; Bohm G; Bruinsma M; Buran T; Capeans M; Chamanina J; Chen BX; Deckers H; Dehmelt K; Dong X; Eckmann R; Emelianov D; Fourletov S; Golutvin I; Hohlmann M; Hopfner K; Hul**ergen W; Jia Y; Jiang C; Kapitza H; Karabekyan S; Ke Z; Kiryushin Y; Kolanoski H; Korpar S; Krizan P; Krucker D; Lanyov A; Liu YQ; Lohse T; Loke R; Mankel R; Medin G; Michel E; Moshkin A; Ni J; Nowak S; Ouchrif M; Padilla C^*; Pose D

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2003, 515(1-2): 155-165.

DOI：10.1016/j.nima.2003.08.144

• gaseous detectors
• tracker
• malter effect
• anode aging
• plasma corrosion
• persistent dark current

The HERA-B Outer Tracker consists of drift tubes folded from polycarbonate foil and is operated with Ar/CF4/CO2 as drift gas. The detector has to stand radiation levels which are similar to LHC conditions. The first prototypes exposed to radiation in HERA-B suffered severe radiation damage due to the development of self-sustaining currents (Malter effect). In a subsequent extended R&D program major changes to the original concept for the drift tubes (surface conductivity, drift gas, production materials) have been developed and validated for use in harsh radiation environments. In the test program various aging effects (such as Malter currents, gain loss due to anode aging and etching of the anode gold surface) were observed, and cures by tuning of operation parameters were developed.

• 出版日期2003-12-1
• 单位清华大学