CYCLOTRONS 2010 - List of Authors (Lu, Y.L.)

Paper

Title

Page

Beam Extraction System for CYCIAE-14

105

S.M. Wei, S. An, W.P. Hu, M. Li, Y.L. Lu, L.P. Wen, H.D. Xie, J.S. Xing, Z.G. Yin, T.J. Zhang
CIAE, Beijing, People's Republic of China

A 14MeV medical cyclotron is under design and construction at CIAE, and H⁻ ion will be accelerated and extracted by carbon stripper in dual opposite direction. Two stripping points are chosen in each extracting direction to extract proton beams to different targets or beam lines to extend the use of the machine. Two modes have been considered for the extraction system. One is designed to be installed on the wall of the vacuum cavity, and the other is designed to be inserted vertically from the sector poles. The final choice depends on the agility, simplicity and results of the experimentation. The angle between the stripper and the beam orbit is optimized to improve the extracted beam quality. The results of numerical simulation show the two stripping points at each extraction direction, the beam orbit and the beam characteristic at each extraction direction. The comparison of the beam envelope of different stripper azimuth is also presented in this paper to show the influence of the stripper azimuth. Based on the concept design, the mechanical design and the experimentation of the DC motor in magnetic field have been conducted, with the results shown in the paper as well.

MOPCP030

The Injection Line and Central Region Design of CYCIAE-70

111

M. Li, X.L. Jia, Y.L. Lu, C. Wang, J.J. Yang, H.J. Yao, T.J. Zhang
CIAE, Beijing, People's Republic of China

A compact cyclotron CYCIAE-70 is under design at CIAE capable of providing both 70MeV, 700μA H⁻ beam and 35MeV, 40μA D- beam. Both beams are produced by a single external multicusp ion source, injected axially with a transport line and bent onto the median plane through a spiral inflector. The injection line utilizes two solenoids and a quadruple triplet for transverse focusing and a buncher to increase the injection efficiency. The beam optics design is performed using TRANSOPTR, taking into account space charge effects and neutralization. The inflector is capable of bending both H⁻ and D- beams with a transmission efficiency of over 80%. The central particles are tracked backwards to obtain the initial reference orbit of the first several turns. The electrode structures and the shape of Dee tips are then optimized to achieve matching at the inflector exit and to maximize the acceptance of central region. The central region is capable to accept both beams without component replacement. The preliminary design results of the injection line, spiral inflector and center region are elaborated, and the beam matching from the ion source to the central region is presented.

TUA2CIO01

Progress on Construction of CYCIAE-100

308

T.J. Zhang, Z.G. Li, Y.L. Lu
CIAE, Beijing, People's Republic of China

As a driving accelerator for RIB production, CYCIAE-100 will provide proton beam of 75MeV~100MeV with an intensity of 200 μA~500 μA. The design for each system has been accomplished and about 50% of fabricating work has been finished. The main magnet manufacture has entered the fine machining stage. Two main magnet coils have been completed, two 100 kW RF power supplies and transmission lines are tested with full output power, and the main vacuum chamber and main magnet elevating system will be completed soon. The construction designs and market surveys for other systems are finished and ready for purchase. Some key design and technology experiments are in process and significant results have been achieved in verifications. The Comprehensive Test Stand (CRM) has successfully passed the authoritative certification, and an important progress has been made for a full scale experimental RF cavity and its frequency and Q value measured agree well with the numerical data. The certification test of vacuum cryo-panel structure has been finished with valuable information to cryo-panel design. Key technical problems related to CYCIAE-100 are being solved along with the progress.

Slides TUA2CIO01 [11.584 MB]

Paper	Title	Page
MOPCP026	Beam Extraction System for CYCIAE-14	105
	S.M. Wei, S. An, W.P. Hu, M. Li, Y.L. Lu, L.P. Wen, H.D. Xie, J.S. Xing, Z.G. Yin, T.J. Zhang CIAE, Beijing, People's Republic of China
	A 14MeV medical cyclotron is under design and construction at CIAE, and H⁻ ion will be accelerated and extracted by carbon stripper in dual opposite direction. Two stripping points are chosen in each extracting direction to extract proton beams to different targets or beam lines to extend the use of the machine. Two modes have been considered for the extraction system. One is designed to be installed on the wall of the vacuum cavity, and the other is designed to be inserted vertically from the sector poles. The final choice depends on the agility, simplicity and results of the experimentation. The angle between the stripper and the beam orbit is optimized to improve the extracted beam quality. The results of numerical simulation show the two stripping points at each extraction direction, the beam orbit and the beam characteristic at each extraction direction. The comparison of the beam envelope of different stripper azimuth is also presented in this paper to show the influence of the stripper azimuth. Based on the concept design, the mechanical design and the experimentation of the DC motor in magnetic field have been conducted, with the results shown in the paper as well.

MOPCP030	The Injection Line and Central Region Design of CYCIAE-70	111
	M. Li, X.L. Jia, Y.L. Lu, C. Wang, J.J. Yang, H.J. Yao, T.J. Zhang CIAE, Beijing, People's Republic of China
	A compact cyclotron CYCIAE-70 is under design at CIAE capable of providing both 70MeV, 700μA H⁻ beam and 35MeV, 40μA D- beam. Both beams are produced by a single external multicusp ion source, injected axially with a transport line and bent onto the median plane through a spiral inflector. The injection line utilizes two solenoids and a quadruple triplet for transverse focusing and a buncher to increase the injection efficiency. The beam optics design is performed using TRANSOPTR, taking into account space charge effects and neutralization. The inflector is capable of bending both H⁻ and D- beams with a transmission efficiency of over 80%. The central particles are tracked backwards to obtain the initial reference orbit of the first several turns. The electrode structures and the shape of Dee tips are then optimized to achieve matching at the inflector exit and to maximize the acceptance of central region. The central region is capable to accept both beams without component replacement. The preliminary design results of the injection line, spiral inflector and center region are elaborated, and the beam matching from the ion source to the central region is presented.

TUA2CIO01	Progress on Construction of CYCIAE-100	308
	T.J. Zhang, Z.G. Li, Y.L. Lu CIAE, Beijing, People's Republic of China
	As a driving accelerator for RIB production, CYCIAE-100 will provide proton beam of 75MeV~100MeV with an intensity of 200 μA~500 μA. The design for each system has been accomplished and about 50% of fabricating work has been finished. The main magnet manufacture has entered the fine machining stage. Two main magnet coils have been completed, two 100 kW RF power supplies and transmission lines are tested with full output power, and the main vacuum chamber and main magnet elevating system will be completed soon. The construction designs and market surveys for other systems are finished and ready for purchase. Some key design and technology experiments are in process and significant results have been achieved in verifications. The Comprehensive Test Stand (CRM) has successfully passed the authoritative certification, and an important progress has been made for a full scale experimental RF cavity and its frequency and Q value measured agree well with the numerical data. The certification test of vacuum cryo-panel structure has been finished with valuable information to cryo-panel design. Key technical problems related to CYCIAE-100 are being solved along with the progress.
	Slides TUA2CIO01 [11.584 MB]