Superconducting 7T wave length shifter for BESSY-II

被引：7

作者：

Borovikov, VM

Djurba, VK

Fedurin, MG

Repkov, VV

Karpov, GV

Kulipanov, GN

Kuzin, MV

Mezentsev, NA

Shkaruba, VA

Kraemer, D

Richter, D

机构：

[1] Russian Acad Sci, SB, Budker Inst Nucl Phys, Synchrotron Radiat Lab, Novosibirsk 630090, Russia

[2] BESSY II, Berlin, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2001年 / 467卷

关键词：

superconducting magnet; magnetic field; cryostat; synchrotron radiation;

D O I：

10.1016/S0168-9002(01)00269-8

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A superconducting 3-pole Wave Length Shifter (WLS) with a maximum field of 7 T was fabricated and tested by BINP in collaboration with BESSY-II. The radiation point is fixed in the center of WLS at any field level by using two correctors. The magnetic field is stabilized with an accuracy of 10(-4) at 7 T by a feedback system based on NMR probes and magnetic flux pumps. Persistent current operation mode is enabled by using superconducting persistent keys. The magnetic field homogeneity of 10(-4) at 7 T is obtained as a result of shimming in the aperture of the magnet. A protection system based on cold diodes and dump resistors prevents the destruction of superconducting coils during the quench. Two screens with temperatures of 20 and 60 K cooled by cooling machine, two recondensers, HTSC current leads and cevlar suspensions of helium volume are used to decrease liquid helium consumption. The main features and operating mode of the WLS are described. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：181 / 184

页数：4