Advertisement

Beam position monitors as precise phase pickups for beam energy measurement at the Compact Pulsed Hadron Source

  • Min-Wen Wang
  • Qing-Zi Xing
  • Shu-Xin ZhengEmail author
  • Zhong-Ming Wang
  • Meng-Tong Qiu
  • Xia-Ling Guan
  • Xue-Wu Wang
  • Wen-Hui Huang
Article
  • 10 Downloads

Abstract

The 13-MeV proton linac of the Compact Pulsed Hadron Source (CPHS) at Tsinghua University, China, is composed of a 50-keV electron cyclotron resonance proton source, a 3-MeV four-vane-type radio-frequency quadrupole (RFQ) accelerator, and a drift tube linac (DTL). Precise measurement of the beam energies at the exit of the RFQ and the DTL is critical for DTL commissioning. Two button-type beam position monitors (BPMs) installed downstream of the RFQ are used to perform the measurement using a time-of-flight method. The effects of several factors on phase measurement accuracy are analyzed. The phase measurement accuracy of the BPMs at CPHS is better than \(\pm 1.03^\circ\) at 325 MHz after corrections, corresponding to an energy measurement error of ± 0.07%. The beam energy measured at the exit of the RFQ is \(2.994\pm 0.0022\) MeV, which is consistent with the design value.

Keywords

Beam energy Time of flight Beam position monitor Phase pickup 

References

  1. 1.
    J. Wei, C.Y. Tang, Q.Z. Xing, et al., Compact pulsed Hadron source—a university-based accelerator platform for multidisciplinary neutron and proton applications, in Proceedings of the PAC2009 Google Scholar
  2. 2.
    R.J. Leeper, J.R. Lee, L. Kissel et al., Direct measurement of the energy spectrum of an intense proton beam. J. Appl. Phys. 60(12), 4059–4063 (1986).  https://doi.org/10.1063/1.337536 CrossRefGoogle Scholar
  3. 3.
    V.E. Scarpine, Y.C. Tan, P.R. Karns et al., Instrumentation developments and beam studies for the Fermilab proton improvement plan LINAC upgrade and new RFQ front-end, in Proceedings of HB2012 Google Scholar
  4. 4.
    B. Dehning, N. Hilleret, J. Prochnow et al., Status of the LEP2 Spectrometer Project, in Proceedings of EPAC2000 Google Scholar
  5. 5.
    Z. Kormany, A new method and apparatus for measuring the mean energy of cyclotron beams. Nucl. Instrum. Methods A 337(2–3), 258–264 (1994).  https://doi.org/10.1016/0168-9002(94)91093-6 CrossRefGoogle Scholar
  6. 6.
    C. Piel, K. Dunkel, M. Pekeler et al., Beam operation of the SARAF light ion injector, in Proceedings of the PAC2007 Google Scholar
  7. 7.
    P. Ausset, M.B. Abdillah, F. Fournier et al., Operation of the beam position monitor for the spiral 2 Linac on the test bench of the RFQ, in Proceedings of IBIC2016 Google Scholar
  8. 8.
    M.W. Wang, S.X. Zheng, X.L. Guan et al., BPM design and test result of Xi’an proton application facility. Atomic Energy Sci. Technol. 52(1), 161–167 (2018)Google Scholar
  9. 9.
    J.G. Hwang, T.K. Yang, P. Forck, High precision capacitive beam phase probe for KHIMA project. Nucl. Instrum. Methods A 837, 34–39 (2016).  https://doi.org/10.1016/j.nima.2016.08.042 CrossRefGoogle Scholar
  10. 10.
    J.D. Gilpatrick, T.R. Hodapp, K.F. Johnson et al., LEDA and APT beam diagnostics instrumentation, in Proceedings of PAC1997 Google Scholar
  11. 11.
    C. Jamet, W. Le Coz, C. Doutressoulles et al., Phase and amplitude measurement for the SPIRAL2 accelerator, in Proceedings of DIPAC2009 Google Scholar
  12. 12.
    Y.F. Sui, J. Cao, J. He et al., Beam commissioning of C-ADS Linac instrumentation, in Proceedings of HB2016 Google Scholar
  13. 13.
    Keysight-Technologies, E8663D PSG RF analog signal generator—data sheet. http://literature.cdn.keysight.com/litweb/pdf/5990-4136EN.pdf?id=1754913. Accessed 17 May 2018
  14. 14.
  15. 15.
    S.S. Kurennoy et al., Beam phase detectors for spallation neutron source linac, in proceedings of EPAC200 Google Scholar
  16. 16.
    M. Cohen-Solal et al., Design, test, and calibration of an electrostatic beam position monitor. Phys. Rev. ST Accel. Beams 13, 032801 (2010).  https://doi.org/10.1103/PhysRevSTAB.13.032801 CrossRefGoogle Scholar
  17. 17.
  18. 18.
    TraceWIN code. http://irfu.cea.fr/en/Phocea/Page/index.php?id=780. Accessed 17 May 2018

Copyright information

© China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Min-Wen Wang
    • 1
    • 2
    • 3
    • 4
  • Qing-Zi Xing
    • 1
    • 2
    • 3
  • Shu-Xin Zheng
    • 1
    • 2
    • 3
    Email author
  • Zhong-Ming Wang
    • 4
  • Meng-Tong Qiu
    • 4
  • Xia-Ling Guan
    • 1
    • 2
    • 3
  • Xue-Wu Wang
    • 1
    • 2
    • 3
  • Wen-Hui Huang
    • 1
    • 2
    • 3
  1. 1.Laboratory of Particle and Radiation Imaging, Ministry of EducationTsinghua UniversityBeijingChina
  2. 2.Laboratory for Advanced Radiation Sources and ApplicationTsinghua UniversityBeijingChina
  3. 3.Department of Engineering PhysicsTsinghua UniversityBeijingChina
  4. 4.State Key Laboratory of Intense Pulsed Radiation Simulation and EffectNorthwest Institute of Nuclear TechnologyXi’anChina

Personalised recommendations