Abstract
The SC200 proton therapy superconducting cyclotron was developed by ASIPP (Hefei, China) and JINR (Dubna, Russia). A measurement system was designed to assess the average radial component of the magnetic field (Brav) with 15 search coils in the median plane. The winding differences of the search coils affect the measurement accuracy of the Brav. Based on the electromagnetic induction principle, to measure the Brav accurately, this paper focuses on the design and commissioning of the Brav measurement system. The preliminary results confirm that the system design is reasonable and suitable. After testing the search coil at different speeds, the optimal speed was determined as 2.5 mm/s. The relative error was approximately 0.1% under the maximum radial component of the magnetic field Br of 7 G. The measurement precision was up to 1.0 × 10−3, which can provide the required measurement tolerance of 3–7 G for Br in the median plane. The commissioning of the Brav measurement system is an important step for Br measurement. It can check and adjust the asymmetry of the superconducting coils (SCs).
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References
G.A. Karamysheva, O.V. Karamyshev, N.A. Morozov et al., Magnetic system for SC200 superconducting cyclotron for proton therapy, in Proceedings of Cyclotrons 2016, Zurich, Switzerland, Cyclotrons (2016), pp. 353–355. https://doi.org/10.18429/jacow-cyclotrons2016-thc03
M.M. Xu, Y.T. Song, Conceptual design of scanning magnets for superconducting proton therapy facility. IEEE Trans. Appl. Supercond. 27, 1–8 (2017). https://doi.org/10.1109/TASC.2017.2698201
J.I.M. Botman, H.L. Hagedoorn, Median plane effects in the Eindhoven AVF cyclotron. IEEE Trans. Nucl. Sci. 28, 2128–2130 (1981). https://doi.org/10.1109/TNS.1981.4331613
S. Brandenburg, W.K. van Asselt, M.A. Hofstee, et al., Vertical beam motion in the AGOR cyclotron, in Proceedings of EPAC 2004, Switzerland (2004), pp. 1384–1386. http://accelconf.web.cern.ch/AccelConf/e04/PAPERS/TUPLT098.PDF. Accessed 20 Mar 2018
J. Stursa, V. Bejeovec, A. Borkovzi et al., The axial injection system of the isochronous cyclotron (1992), pp. 1513–1515. http://accelconf.web.cern.ch/AccelConf/e92/PDF/EPAC1992_1513.PDF. Accessed 20 Mar 2018
S. Vorojtsov, N. Morozov, E. Bakewicz et al., Harmonic coil application for shaping of the magnetic field of isochronous cyclotron AIC-144, (2000). http://www.jinr.ru/Preprints/2000/P9200039.pdf. Accessed 20 Mar 2018
J. Van de Walle, W. Kleeven, C. L’Abbate, et al. Mapping of the new IBA superconducting SYNCHROCYCLOTRON (S2C2) for proton therapy, in Proceedings of Cyclotrons, Vancouver, BC, Canada (2013), pp. 272–274. http://accelconf.web.cern.ch/AccelConf/CYCLOTRONS2013/papers/tu4pb01.pdf. Accessed 20 Mar 2018
K.H. Park, Y.G. Jung, D.E. Kim et al., Field mapping system for cyclotron magnet. Nucl. Inst. Methods Phys. Res. A 545, 533–541 (2005). https://doi.org/10.1016/j.nima.2005.02.009
S. Marks, Precise integration of undulator Hall probe scans. IEEE Trans. Magn. Mag. 30, 2435–2438 (1994). https://doi.org/10.1109/20.305769
Y. Paradis, D. Vandeplassche, W. Beeckman, et al. The magnetic field mapping system for the IBA C70 cyclotron. Cyclotr. Appl. (2007). http://accelconf.web.cern.ch/accelconf/c07/PAPERS/78.PDF. Accessed 20 Mar 2018
A. K. Jain, Overview of magnetic measurement techniques. CERN Academic Training Program (2003). http://cds.cern.ch/record/610089. Accessed 20 Mar 2018
M. Li, Y.L. Lv, L. Cao et al., Field mapping system design for the superconducting cyclotron CYCIAE-230. IEEE Trans. Appl. Supercond. 28, 1 (2018). https://doi.org/10.1109/TASC.2018.2789447
A. K. Jain, Magnetic field measurements and mapping techniques. CERN Academic Training Program (2003). http://cds.cern.ch/record/610089?ln=zh_CN. Accessed 20 Mar 2018
K.N. Henrichsen, Classification of magnetic measurement methods. CERN 16, 70–83 (1992). https://doi.org/10.5170/CERN-1992-005.70
L.H. Harwood, J.A. Nolen, M. Fowler et al., Characteristics and performance of the system developed for magnetic mapping of the NSCL superconducting K800 cyclotron magnet. IEEE Trans. Nucl. Sci. 32, 3734 (1985). https://doi.org/10.1109/tns.1985.4334485
G.A. Karamysheva, S.G. Kostromin, N.A. Morozov, et al., Development of a method for measuring the radial component of the magnetic field in AVF cyclotrons, in Accelerator Technology Main Systems: Proceedings of IPAC2014 (2014), pp. 1274–1276. https://doi.org/10.18429/jacow-IPAC2014-TUPRO099
G. Karamysheva, N. Morozov, P. Shishlyannikov, Median plane effects and measurement method for radial component of magnetic field in AVF cyclotrons, in Magnet and Vacuum: Proceedings of CYCLOTRONS 2010, Lanzhou, China, Cyclotrons (2010), pp. 206–208. https://doi.org/10.18429/jacow-APAC2010-MOPCP077
A. Roy, T. Bhattacharjee, R.B. Bhole, et al., Median plane magnetic field mapping for superconducting cyclotron (SCC) in VECC, in Accelerator Technology: APAC 2007, Raja Ramanna Centre for Advanced Technology (RRCAT), Indore, India (2007), pp. 652–654. https://doi.org/10.18429/jacow-APAC2007-THPMA016
O.V. Karamyshev, G.A. Karamysheva, N.A. Morozov, et al., Beam tracking simulation for SC200 superconducting cyclotron (2016), pp. 1268–1271. https://doi.org/10.18429/jacow-ipac2016-tupmr018
N.A. Morozov, O.V. Karamyshev, G.A. Karamysheva, et al., Computer modeling of magnet for SC200 superconducting cyclotron, in Hadron Accelerators: Proceedings of IPAC2016, Busan, Korea, Cyclotrons (2016), pp. 1265–1268. https://doi.org/10.18429/jacow-ipac2016-tupmr017
K.Z. Ding, Y.F. Bi, G. Chen, et al., Study of the beam extraction from superconducting cyclotron SC200, in Proceedings of Cyclotrons2016, Zurich, Switzerland, Cyclotrons (2016), pp. 87–91. https://doi.org/10.18429/jacow-cyclotrons2016-mop14
G.A. Karamysheva, Y.F. Bi, G. Chen, et al., Compact superconducting cyclotron SC200 for proton therapy, in Proceedings of Cyclotrons2016, Zurich, Switzerland, Cyclotrons (2016), pp. 371–373. https://doi.org/10.18429/jacow-cyclotrons2016-thc03
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This work was supported by the Natural Science Foundation of Anhui under Grant (No. 1908085QA25), the Research Initiation Foundation of Anhui Polytechnic University (No. 2018YQQ001), the Pre-Research National Natural Science Foundation of China of Anhui Polytechnic University (No. 2019yyzr13), the National Natural Science Foundation of China (Nos. 11575237 and 11775258), the National Magnetic Confinement Fusion Science Program (No. 2015GB101001), and the International Scientific and Technological Cooperation Project of Anhui (No. 1704e1002207).
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Xu, MM., Song, YT., Chen, G. et al. Design and commissioning of Brav measurement system for SC200 superconducting cyclotron. NUCL SCI TECH 30, 93 (2019). https://doi.org/10.1007/s41365-019-0614-2
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DOI: https://doi.org/10.1007/s41365-019-0614-2