High-power rotating wheel targets at RIKEN

Atsushi Yoshida; Kousuke Morita; Kouji Morimoto; Daiya Kaji; Toshiyuki Kubo; Yutaka Takahashi; Akira Ozawa; Isao Tanihata

doi:10.1016/j.nima.2003.11.408

High-power rotating wheel targets at RIKEN

Atsushi Yoshida^*
, Kousuke Morita
, Kouji Morimoto
, Daiya Kaji
, Toshiyuki Kubo
, Yutaka Takahashi
, Akira Ozawa
, Isao Tanihata

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

17 Scopus citations

Abstract

Two kinds of rotating wheel targets for high-power heavy ion reaction have been developed. One is a thick disk target with water-cooling being developed for the in-flight RI beam separator (BigRIPS). An in-beam test was performed using ⁴⁰Ar beam at 24AMeV, 1.9particle μA, with the beam spot size 3mm in diameter, resulting 0.25GW/m² beam power stopped at the surface of carbon disk 2mm in thickness and 260mm in diameter. It performed stably without melting. A simulation study has been developed and its possibility for the use of BigRIPS is discussed. The second is a thin target foil mounted on a wheel disk which rotates in He cooling gas of 13.32-133.2Pa. Its main use is in fusion reactions to search for super-heavy elements by using the gas-filled recoil separator (GARIS). A typical foil is Pb or Bi of 200-300μg/cm² in thickness evaporated onto a carbon backing foil of 30μg/cm² thickness, and covered by evaporated carbon of 10μg/cm² thickness. It can withstand long use under high-intensity ⁶⁴Ni beam at 311MeV, and 0.5particle μA.

Original language	English
Pages (from-to)	65-71
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	521
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2003.11.408
State	Published - 21 Mar 2004
Externally published	Yes
Event	Accelerator Target Technology for the 21st Century. Proceeding - Argonne, IL., United States Duration: 4 Nov 2002 → 8 Nov 2002

Keywords

Design of high-power targets
Development of targets
Heavy-element synthesis
RIKEN-BigRIPS
RIKEN-GARIS
Radioactive beams

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10.1016/j.nima.2003.11.408

Cite this

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title = "High-power rotating wheel targets at RIKEN",

abstract = "Two kinds of rotating wheel targets for high-power heavy ion reaction have been developed. One is a thick disk target with water-cooling being developed for the in-flight RI beam separator (BigRIPS). An in-beam test was performed using 40Ar beam at 24AMeV, 1.9particle μA, with the beam spot size 3mm in diameter, resulting 0.25GW/m2 beam power stopped at the surface of carbon disk 2mm in thickness and 260mm in diameter. It performed stably without melting. A simulation study has been developed and its possibility for the use of BigRIPS is discussed. The second is a thin target foil mounted on a wheel disk which rotates in He cooling gas of 13.32-133.2Pa. Its main use is in fusion reactions to search for super-heavy elements by using the gas-filled recoil separator (GARIS). A typical foil is Pb or Bi of 200-300μg/cm2 in thickness evaporated onto a carbon backing foil of 30μg/cm2 thickness, and covered by evaporated carbon of 10μg/cm2 thickness. It can withstand long use under high-intensity 64Ni beam at 311MeV, and 0.5particle μA.",

keywords = "Design of high-power targets, Development of targets, Heavy-element synthesis, RIKEN-BigRIPS, RIKEN-GARIS, Radioactive beams",

author = "Atsushi Yoshida and Kousuke Morita and Kouji Morimoto and Daiya Kaji and Toshiyuki Kubo and Yutaka Takahashi and Akira Ozawa and Isao Tanihata",

year = "2004",

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T1 - High-power rotating wheel targets at RIKEN

AU - Yoshida, Atsushi

AU - Morita, Kousuke

AU - Morimoto, Kouji

AU - Kaji, Daiya

AU - Kubo, Toshiyuki

AU - Takahashi, Yutaka

AU - Ozawa, Akira

AU - Tanihata, Isao

PY - 2004/3/21

Y1 - 2004/3/21

N2 - Two kinds of rotating wheel targets for high-power heavy ion reaction have been developed. One is a thick disk target with water-cooling being developed for the in-flight RI beam separator (BigRIPS). An in-beam test was performed using 40Ar beam at 24AMeV, 1.9particle μA, with the beam spot size 3mm in diameter, resulting 0.25GW/m2 beam power stopped at the surface of carbon disk 2mm in thickness and 260mm in diameter. It performed stably without melting. A simulation study has been developed and its possibility for the use of BigRIPS is discussed. The second is a thin target foil mounted on a wheel disk which rotates in He cooling gas of 13.32-133.2Pa. Its main use is in fusion reactions to search for super-heavy elements by using the gas-filled recoil separator (GARIS). A typical foil is Pb or Bi of 200-300μg/cm2 in thickness evaporated onto a carbon backing foil of 30μg/cm2 thickness, and covered by evaporated carbon of 10μg/cm2 thickness. It can withstand long use under high-intensity 64Ni beam at 311MeV, and 0.5particle μA.

AB - Two kinds of rotating wheel targets for high-power heavy ion reaction have been developed. One is a thick disk target with water-cooling being developed for the in-flight RI beam separator (BigRIPS). An in-beam test was performed using 40Ar beam at 24AMeV, 1.9particle μA, with the beam spot size 3mm in diameter, resulting 0.25GW/m2 beam power stopped at the surface of carbon disk 2mm in thickness and 260mm in diameter. It performed stably without melting. A simulation study has been developed and its possibility for the use of BigRIPS is discussed. The second is a thin target foil mounted on a wheel disk which rotates in He cooling gas of 13.32-133.2Pa. Its main use is in fusion reactions to search for super-heavy elements by using the gas-filled recoil separator (GARIS). A typical foil is Pb or Bi of 200-300μg/cm2 in thickness evaporated onto a carbon backing foil of 30μg/cm2 thickness, and covered by evaporated carbon of 10μg/cm2 thickness. It can withstand long use under high-intensity 64Ni beam at 311MeV, and 0.5particle μA.

KW - Design of high-power targets

KW - Development of targets

KW - Heavy-element synthesis

KW - RIKEN-BigRIPS

KW - RIKEN-GARIS

KW - Radioactive beams

UR - https://www.scopus.com/pages/publications/1642382523

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DO - 10.1016/j.nima.2003.11.408

M3 - 会议文章

AN - SCOPUS:1642382523

SN - 0168-9002

VL - 521

SP - 65

EP - 71

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 1

T2 - Accelerator Target Technology for the 21st Century. Proceeding

Y2 - 4 November 2002 through 8 November 2002

ER -

High-power rotating wheel targets at RIKEN

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Keywords

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