CYCLOTRONS 2010 - List of Authors (Jia, X.L.)

Paper	Title	Page
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.

Paper

Title

Page

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.