IPAC2011 - List of Authors (Morinobu, S.)

Paper	Title	Page
WEPO028	Design of HTS Sector Magnets for the RCNP New Injector Cyclotron	2460
	K. Hatanaka, M. Fukuda, N. Izumi, M. Kibayashi, S. Morinobu, K. Nagayama, T. Saito, H. Tamura, H. Ueda, Y. Yasuda, T. Yorita RCNP, Osaka, Japan T. Kawaguchi KT Science Ltd., Akashi, Japan
	The RCNP cyclotron cascade system consists of K140 AVF cyclotron and K400 ring cyclotron and is providing high quality beams for various experiments. There are increasing demands for high intensity beams and even to improve the quality. In order to increase the physics research opportunities, a new injector cyclotron is recently proposed, which has four separated sector magnets and two accelerating cavities. Sector magnets are designed to use High Temperature Superconducting (HTS) wire. At RCNP we have been developing magnets with HTS wires for a decade. In this paper, we will report recent results of developed HTS magnets and the design of sector magnets for the new injector SSC.

WEPS080	Development of High-quality Intense Proton Beam at the RCNP Cyclotron Facility	2694
	M. Fukuda, K. Hatanaka, M. Kibayashi, S. Morinobu, K. Nagayama, T. Saito, H. Tamura, H. Ueda, H. Yamamoto, T. Yorita RCNP, Osaka, Japan
	A 2.45 GHz ECR proton source, equipped with a set of three permanent magnets, was developed to increase the intensity of a high-quality proton beam. A 15 keV proton beam with intensity of 0.6 mA was produced with a proton ratio of more than 80 %. Emittance of the proton beam with intensity of 50 to 100 micro-A in the LEBT system was around 50 pi-mm-mrad. Beam transmission, defined by the ratio of the beam intensity between a Faraday cup placed in the axial injection beam line and an inflector electrode of the AVF cyclotron, was improved from 25 % for a 70 micro-A proton beam to more than 90 % for 30 micro-A obtained by defining the injection beam with a beam slit of iris type. The result indicated that the beam transmission was limited by the acceptance of the axial injection beam line. Emittance of the 65 MeV proton beam accelerated by the K140 AVF cyclotron was a few pi-mm-mrad for beam intensity of several-micro-A. In this paper, development of the intense proton beam and evaluation of the proton beam quality will be mainly reported.

Paper

Title

Page

Design of HTS Sector Magnets for the RCNP New Injector Cyclotron

2460

K. Hatanaka, M. Fukuda, N. Izumi, M. Kibayashi, S. Morinobu, K. Nagayama, T. Saito, H. Tamura, H. Ueda, Y. Yasuda, T. Yorita
RCNP, Osaka, Japan
T. Kawaguchi
KT Science Ltd., Akashi, Japan

The RCNP cyclotron cascade system consists of K140 AVF cyclotron and K400 ring cyclotron and is providing high quality beams for various experiments. There are increasing demands for high intensity beams and even to improve the quality. In order to increase the physics research opportunities, a new injector cyclotron is recently proposed, which has four separated sector magnets and two accelerating cavities. Sector magnets are designed to use High Temperature Superconducting (HTS) wire. At RCNP we have been developing magnets with HTS wires for a decade. In this paper, we will report recent results of developed HTS magnets and the design of sector magnets for the new injector SSC.

WEPS080

Development of High-quality Intense Proton Beam at the RCNP Cyclotron Facility

2694

M. Fukuda, K. Hatanaka, M. Kibayashi, S. Morinobu, K. Nagayama, T. Saito, H. Tamura, H. Ueda, H. Yamamoto, T. Yorita
RCNP, Osaka, Japan

A 2.45 GHz ECR proton source, equipped with a set of three permanent magnets, was developed to increase the intensity of a high-quality proton beam. A 15 keV proton beam with intensity of 0.6 mA was produced with a proton ratio of more than 80 %. Emittance of the proton beam with intensity of 50 to 100 micro-A in the LEBT system was around 50 pi-mm-mrad. Beam transmission, defined by the ratio of the beam intensity between a Faraday cup placed in the axial injection beam line and an inflector electrode of the AVF cyclotron, was improved from 25 % for a 70 micro-A proton beam to more than 90 % for 30 micro-A obtained by defining the injection beam with a beam slit of iris type. The result indicated that the beam transmission was limited by the acceptance of the axial injection beam line. Emittance of the 65 MeV proton beam accelerated by the K140 AVF cyclotron was a few pi-mm-mrad for beam intensity of several-micro-A. In this paper, development of the intense proton beam and evaluation of the proton beam quality will be mainly reported.