KARMEN upgrade and prospects at ESS

被引：22

作者：

Drexlin, G ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Kernphys 1, D-76021 Karlsruhe, Germany

来源：

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 40: NEUTRINOS IN ASTRO, PARTICLE AND NUCLEAR PHYSICS | 1998年 / 40卷

关键词：

D O I：

10.1016/S0146-6410(98)00025-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The KARMEN experiment at the ISIS spallation source has enhanced its sensitivity for <(nu)over bar>(mu) --> <(nu)over bar>(e) Oscillations in 1996 by the installation of an additional large area veto counter system. Consisting of 136 highly transparent plastic scintillator modules, the new veto is completely embedded inside the experiment's 7000 tonne steel blockhouse. It allows to eliminate the main background component in the search for <(nu)over bar>(mu) --> <(nu)over bar>(e) appearance originating from high energy neutrons induced by deep inelastic scattering of cosmic ray muons in the massive shielding. First measurements after the detector upgrade show a substantial reduction of this background meeting the expected factor of 40. If no oscillation signal is seen after 3 years of measuring (1997-99) KARMEN will be able to exclude mixing amplitudes of sin(2) 2 theta similar or equal to 1 x 10(-3). The ongoing KARMEN2 measurements will thus allow a decisive and reliable test of the entire parameter space favoured by the positive result of LSND. An even higher oscillation sensitivity can be achieved by experiments st future high intensity short spill proton accelerators such as the planned European Spallation Source ESS.

引用

页码：193 / 202

页数：10

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