The ion-catcher device for SHIPTRAP

被引：83

作者：

Neumayr, JB

Beck, L

Habs, D

Heinz, S

Szerypo, J

Thirolf, PG

Varentsov, V

Voit, F

Ackermann, D

Beck, D

Block, M

Di, Z

Eliseev, SA

Geissel, H

Herfurth, F

Hessberger, FP

Hofmann, S

Kluge, HJ

Mukherjee, M

Münzenberg, G

Petrick, M

Quint, W

Rahaman, S

Rauth, C

Rodríguez, D

Scheidenberger, C

Sikler, G

Wang, Z

Weber, C

Plass, WR

Breitenfeldt, M

Chaudhuri, A

Marx, G

Schweikhard, L

Dodonov, AF

Novikov, Y

Suhonen, M

机构：

[1] Univ Munich, Dept Phys, LS Habs, D-85748 Garching, Germany

[2] GSI, D-64291 Darmstadt, Germany

[3] Univ Giessen, D-35392 Giessen, Germany

[4] Univ Greifswald, D-17489 Greifswald, Germany

[5] Inst Energy Problems Chem Phys, Chernogolovka, Russia

[6] St Petersburg Nucl Phys Inst, Gatchina, Russia

[7] Stockholm Univ, S-10691 Stockholm, Sweden

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2006年 / 244卷 / 02期

关键词：

buffer-gas cell; radio-frequency fields; RF ion funnel; extraction nozzle;

D O I：

10.1016/j.nimb.2005.10.017

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An ion-catcher device consisting of a buffer-gas stopping cell and a radio-frequency quadrupole (RFQ) has been built for the SHIP-TRAP facility at GSI. Results of characterisation measurements with the buffer-gas cell and the extraction RFQ performed at GSI in Darmstadt and at the MLL (Maier-Leibnitz-Laboratory) in Garching are presented. The set-up was tested off-line using laser-produced ions and on-line using stable beams and fusion-evaporation products. During the on-line measurements the ions with total energies of around 200 keV/u were thermalised in helium buffer gas at 40-60 mbar. In the following they were guided by a combination of electric RF- and DC-fields until they were transported by the gas flow through the extraction nozzle. After being extracted by a supersonic gas jet the ions were separated from the buffer gas and guided by the extraction RFQ towards subsequent detection systems. Depending on the electric-field strength average extraction times of around 10 ms and an overall efficiency (including stopping and extraction) between 4% and 8% have been achieved. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：489 / 500

页数：12

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