TY - JOUR
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
U2 - 10.1016/j.nima.2003.11.408
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 -