The longitudinal polarimeter at HERA

被引：80

作者：

Beckmann, M

Borissov, A

Brauksiepe, S

Burkart, F

Fischer, H

Franz, J

Heinsius, FH

Königsmann, K

Lorenzon, W ^{[1
]}

Menden, FM

Most, A

Rudnitsky, S

Schill, C

Seibert, J

Simon, A

机构：

[1] Univ Michigan, Randall Lab Phys, Ann Arbor, MI 48109 USA

[2] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 479卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

polarized Compton scattering; electron polarimetry;

D O I：

10.1016/S0168-9002(01)00901-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The design, construction and operation of a Compton back-scattering laser polarimeter at the HERA storage ring at DESY are described. The device measures the longitudinal polarization of the electron beam between the spin rotators at the HERMES experiment with a fractional systematic uncertainty of 1.6%. A measurement of the beam polarization to an absolute statistical precision of 0.01 requires typically I min when the device is operated in the mufti-photon mode. The polarimeter also measures the polarization of each individual electron bunch to an absolute statistical precision of 0.06 in approximately 5 min. It was found that colliding and non-colliding bunches can have substantially different polarizations. This information is important to the collider experiments H1 and ZEUS for their future longitudinally polarized electron program because those experiments use the colliding bunches only. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：334 / 348

页数：15

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