A novel ion cooling trap for multi-reflection time-of-flight mass spectrograph

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:317

Article; Proceedings Paper

Ito, Y.^1,2  Schury, P.^1,2,6  Wada, M.¹  Naimi, S.¹  Smorra, C.^1,3  Sonoda, T.¹  Mita, H.^1,2  Takamine, A.^1,4  Okada, K.^1,5  Ozawa, A.²  Wollnik, H.^1,6 

[1] RIKEN, Nishina Accelerator Based Res Ctr, SLOWRI Team, Wako, Saitama 3510198, Japan

[2] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan

[3] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[4] Aoyama Gakuin Univ, Shibuya Ku, Tokyo 1508366, Japan

[5] Sophia Univ, Chiyoda Ku, Tokyo 1028554, Japan

[6] New Mexico State Univ, Dept Chem & Biochem, Las Cruces, NM 88003 USA

关键词: Mass measurements;    Unstable nuclei;    Low-energy beam;    Ion trap;   

DOI  :  10.1016/j.nimb.2013.07.069

来源: Elsevier

【 摘 要 】

A radiofrequency quadrupole ion trap system for use with a multi-reflection time-of-flight mass spectrograph (MRTOF) for short-lived nuclei has been developed. The trap system consists of two different parts, an asymmetric taper trap and a flat trap. The ions are cooled to a sufficient small bunch for precise mass measurement with MRTOF in only 2 ms cooling time in the flat trap, then orthogonally ejected to the MRTOF for mass analysis. A trapping efficiency of approximate to 27% for Na-23(+) and approximate to 5.1% for Li-7(+) has been achieved. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

Free