HB2014 - Table of Session: THO2LR (Working Group B)

Paper

Title

Page

H⁻ Beam Optics for the Laser Stripping Project

350

T.V. Gorlov, A.V. Aleksandrov, S.M. Cousineau, V.V. Danilov, M.A. Plum
ORNL, Oak Ridge, Tennessee, USA

Successful realization of the laser stripping experiment depends mainly on correct tailoring of H⁻ bunch and laser beam. H⁻ beam preparation is a challenging task that requires to tune up about 10 parameters simultaneously in situ and taking into account life state of accelerator. This makes a huge technological difference compared to the foil stripping method. In this paper we present experience and methods of tuning the H⁻ bunch.

THO2LR02

Beam Dynamics and Experiment of CPHS Linac

355

L. Du, C.T. Du, X. Guan, C.-X. Tang, R. Tang, X.W. Wang, Q.Z. Xing, S.X. Zheng
TUB, Beijing, People's Republic of China
M.W. Wang
Tsinghua University, Beijing, People's Republic of China

Funding: Work supported by National Natural Science Foundation of China (Major Research Plan Grant No. 91126003 and 11175096)
We present, in this paper, the present beam dynamics simulation results and experiments of the 3 MeV high current proton linac for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University. The beam dynamics simulations of the recent status of the linac have been done, which helps the operation. Facility used for 2D beam profile measurement which is based on the CT algorithm with rotatable multi-wires, is under development. Some other experiments such as beam position measurement will also be introduced below.

Slides THO2LR02 [3.479 MB]

THO2LR03

Beam Halo Control Study on the ADS Superconducting Linac Design at IHEP

F. Yan, H. Geng, C. Meng, S. Pei, J.Y. Tang
IHEP, Beijing, People's Republic of China
Z. Li
SCU, Chengdu, People's Republic of China

The Accelerator Driven sub-critical System (ADS) has an extremely low beam loss rate demand for the driver linac because of the high power intensity needed to be transferred to the target. China ADS project is proposed to build a 15 MW proton linac with final energy of 1.5 GeV and an average beam current of 10 mA. Fulfilling the 1 W/m power losses restriction along the whole linac posed a very high requirement on the stability of the driver linac design. Most of the beam losses in this level associated with the halo particles. In the design stage of China ADS linac, the beam halo are controlled in several aspects according to the halo formation mechanisms. Reasonable designs have been achieved for the China ADS Injector-I with few percentage of normalized rms emittances. Extensive error analysis were carried out to test the stability of the Injector-I design. The design considerations, the results of an optimized design and the beam dynamic simulations including machine errors are introduced and presented in detail.

Slides THO2LR03 [3.023 MB]

THO2LR04

Catalogue of Losses for the Linear IFMIF Prototype Accelerator

360

N. Chauvin, P.A.P. Nghiem
CEA/DSM/IRFU, France
M. Comunian
INFN/LNL, Legnaro (PD), Italy
C. Oliver
CIEMAT, Madrid, Spain
D. Uriot
CEA/IRFU, Gif-sur-Yvette, France

One major activity of the EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating, in Japan, a 125 mA/9 MeV deuteron accelerator, called LIPAc, which has been developed in Europe. For the accelerator safety aspects, a precise knowledge of beam loss location and power deposition is crucial, especially for a high intensity, high power accelerator like LIPAc. This paper presents the beam dynamics simulations allowing to estimate beam losses in different situations of the accelerator lifetime: starting from scratch, beam commissioning, tuning or exploration, routine operation, sudden failure. Some results of these studies are given and commented on. Recommendations for hot point protection, beam stop velocity, beam power limitation are given accordingly.

Slides THO2LR04 [2.790 MB]

Paper	Title	Page
THO2LR01	H⁻ Beam Optics for the Laser Stripping Project	350
	T.V. Gorlov, A.V. Aleksandrov, S.M. Cousineau, V.V. Danilov, M.A. Plum ORNL, Oak Ridge, Tennessee, USA
	Successful realization of the laser stripping experiment depends mainly on correct tailoring of H⁻ bunch and laser beam. H⁻ beam preparation is a challenging task that requires to tune up about 10 parameters simultaneously in situ and taking into account life state of accelerator. This makes a huge technological difference compared to the foil stripping method. In this paper we present experience and methods of tuning the H⁻ bunch.

THO2LR02	Beam Dynamics and Experiment of CPHS Linac	355
	L. Du, C.T. Du, X. Guan, C.-X. Tang, R. Tang, X.W. Wang, Q.Z. Xing, S.X. Zheng TUB, Beijing, People's Republic of China M.W. Wang Tsinghua University, Beijing, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (Major Research Plan Grant No. 91126003 and 11175096) We present, in this paper, the present beam dynamics simulation results and experiments of the 3 MeV high current proton linac for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University. The beam dynamics simulations of the recent status of the linac have been done, which helps the operation. Facility used for 2D beam profile measurement which is based on the CT algorithm with rotatable multi-wires, is under development. Some other experiments such as beam position measurement will also be introduced below.
	Slides THO2LR02 [3.479 MB]

THO2LR03	Beam Halo Control Study on the ADS Superconducting Linac Design at IHEP
	F. Yan, H. Geng, C. Meng, S. Pei, J.Y. Tang IHEP, Beijing, People's Republic of China Z. Li SCU, Chengdu, People's Republic of China
	The Accelerator Driven sub-critical System (ADS) has an extremely low beam loss rate demand for the driver linac because of the high power intensity needed to be transferred to the target. China ADS project is proposed to build a 15 MW proton linac with final energy of 1.5 GeV and an average beam current of 10 mA. Fulfilling the 1 W/m power losses restriction along the whole linac posed a very high requirement on the stability of the driver linac design. Most of the beam losses in this level associated with the halo particles. In the design stage of China ADS linac, the beam halo are controlled in several aspects according to the halo formation mechanisms. Reasonable designs have been achieved for the China ADS Injector-I with few percentage of normalized rms emittances. Extensive error analysis were carried out to test the stability of the Injector-I design. The design considerations, the results of an optimized design and the beam dynamic simulations including machine errors are introduced and presented in detail.
	Slides THO2LR03 [3.023 MB]

THO2LR04	Catalogue of Losses for the Linear IFMIF Prototype Accelerator	360
	N. Chauvin, P.A.P. Nghiem CEA/DSM/IRFU, France M. Comunian INFN/LNL, Legnaro (PD), Italy C. Oliver CIEMAT, Madrid, Spain D. Uriot CEA/IRFU, Gif-sur-Yvette, France
	One major activity of the EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating, in Japan, a 125 mA/9 MeV deuteron accelerator, called LIPAc, which has been developed in Europe. For the accelerator safety aspects, a precise knowledge of beam loss location and power deposition is crucial, especially for a high intensity, high power accelerator like LIPAc. This paper presents the beam dynamics simulations allowing to estimate beam losses in different situations of the accelerator lifetime: starting from scratch, beam commissioning, tuning or exploration, routine operation, sudden failure. Some results of these studies are given and commented on. Recommendations for hot point protection, beam stop velocity, beam power limitation are given accordingly.
	Slides THO2LR04 [2.790 MB]