Stripping efficiency and lifetime of carbon foils

Chou, W.; Kostin, M.; Tang, Z.

doi:10.1016/j.nima.2008.02.060

Cited by 12 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By using the past experimental data, the stripping efficiency is calculated to be 99.6% [5]. The primary stripper foil will be changed to a thickness of 290 g=cm 2 at the upgraded injection energy of 400 MeV, where the stripping efficiency is expected to be 99.7%, slightly better than the present one [6]. The remaining 0.4% or 0.3% of the unstripped beam is mostly partially stripped particles (single electron detachment) and thus it is neutral (uncharged) and is called H 0 beam.…”

Section: Introductionmentioning

confidence: 89%

State of the art online monitoring system for the waste beam in the rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Saha

Hatakeyama

Yamamoto

et al. 2011

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

The 3 GeV rapid cycling synchrotron (RCS) at Japan Proton Accelerator Research Complex is already in user operation stage, delivering a stable and relatively high power beam to the Material and Life Science Experimental Facility as well as to the main ring. RCS utilizes multiturn H À charge-exchange injection for which a hybrid-type boron doped carbon stripper foil known as HBC foil with a thickness of around 200 g=cm 2 is used at the present injection beam energy of 181 MeV. It will be changed to 290 g=cm 2 at the near future upgrade and design injection beam energy of 400 MeV. The stripping efficiencies are expected to be 99.6% and 99.7% in the present and the later case, respectively. The remaining 0.4% or 0.3% of the beam is called the waste beam and is transported to the injection beam dump with a capacity of only 4 kW. The full power of the injected beam at 400 MeV is 133 kW, while the waste beam power is calculated to be about 0.4 kW. The raw signal measured by a current transformer placed downstream of the waste beam dump line contains a large noise and it is practically very hard to identify the beam signal. However, a fast Fourier transformation analysis of the raw signal made it possible to clearly identify the beam signal. The power spectrum is calibrated with respect to the known injected beam current. The absolute error of the monitor system is 0.2 mV, which gives the ratio of the waste beam to the injected beam as ð0:38 AE 0:03Þ%. Such an accurate and realtime monitoring system provides quite an efficient method to know the conditions of the stripper foil and the incoming linac beam during the user operation.

show abstract

Section: Introductionmentioning

confidence: 89%

State of the art online monitoring system for the waste beam in the rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Saha

Hatakeyama

Yamamoto

et al. 2011

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

show abstract

“…It is worth mentioning that an energy scaling of the crosssections by using 1=β 2 was proposed recently, where β is the relativistic factor of the H À ion [9]. Based on the 800 MeV measurement, an energy scaled cross-sections given for 200 MeV was shown to reproduced those measured ones at 200 MeV within a few percent errors.…”

Section: Introductionmentioning

confidence: 90%

“…The dotted and dashed lines are also the same as the ones calculated for 181 MeV obtained by using energy scaled cross-sections of the previously measured data at 200 MeV [4] and 800 MeV [5], respectively. The energy scaling was done by using 1=β 2 hypothesis [9]. The σ À 11 cross-section was considered to be zero for the 200 MeV case as it was given a negative value and was also treated in the same way by the authors.…”

Section: Tablementioning

confidence: 99%

Measurement of 181 MeV H − ions stripping cross-sections by carbon stripper foil

Saha¹,

Yoshimoto²,

Yamazaki³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

“…Koefisien daya henti hidrogen adalah 1.847 (MeV/(gram.cm 2 ) dan untuk elektron adalah 1.71 MeV/(gramcm 2 ). Koefisien panas jenis foil karbon adalah 0.165 cal/(gram-K) atau 0.6908 J/(gram-K) (8) .…”

Section: Perhitungan Tampang Lintang Reaksiunclassified

“…Kerapatan fraksi NH-, NHo dan NH+, untuk siklotron berenergi 13 MeV dapat dihitung dari persamaan (6), (7) dan (8). Gambar 1 memperlihatkan fraksi kerapatan NH-, NHo dan NH+, sebagai fungsi ketebalan foil.…”

Section: Gambar 2 Fraksi Kerapatan Nh- Nho Dan Nh+ Sebagai Fungsi Tunclassified

PERHITUNGAN PARAMETER FISIS SISTEM EKSTRAKTOR SIKLOTRON 13 MeV UNTUK PET

Usada¹,

Aziz²

2011

gnd

View full text Add to dashboard Cite

PERHITUNGAN PARAMETER FISIS SISTEM EKSTRAKTOR SIKLOTRON 13 MeV UNTUK PET. Telah dilakukanperhitungan parameter fisis sistem ekstraktor siklotron 13 MEV untuk PET. Untuk medan magnet rata-rata 1,275 T,maka posisi ekstraktor sekitar 40,4 cm dari pusat siklotron. Untuk tegangan dee 40 kV dan sudut dee 400, diperolehperolehan energi setiap putaran sebesar 159 keV, jumlah putaran 81 dan jarak antara putaran 5 mm. Parameterjarak ini sangat diperlukan untuk menentukan lebar ukuran foil ekstraktor. Hasil perhitungan deposisi energi padafoil menunjukkan bahwa untuk arus berkas proton 20 μA, dan tampang lintang berkas 0.9 cm2, diperoleh umur foilsekitar 56 detik.Kata kunci : Siklotron, proton, ekstraksi, stripper, foil karbon

show abstract

Stripping efficiency and lifetime of carbon foils

Cited by 12 publications

References 15 publications

State of the art online monitoring system for the waste beam in the rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

State of the art online monitoring system for the waste beam in the rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Measurement of 181 MeV H − ions stripping cross-sections by carbon stripper foil

PERHITUNGAN PARAMETER FISIS SISTEM EKSTRAKTOR SIKLOTRON 13 MeV UNTUK PET

Contact Info

Product

Resources

About