IPAC2011 - Classification: 08 Applications of Accelerators, Technology Transfer and Industrial Relations / U02 Materials Analysis and Modification

Paper

Title

Page

Accelertor-based Mega-science Projects in China and Their Impact on Economy

1986

C. Zhang
IHEP Beijing, Beijing, People's Republic of China

Along with the rapid development of national economy in China, a number of accelerator based mega-science projects were constructed, such as the Beijing Electron-Positron Colliders (BEPC) and its major upgrade project (BEPCII), the Hefei Light Source (HLS), the Heavy Ion Research Facility in Lanzhou (HIRFL) and its Cooling Storage Rings (HIEFL-CSR), the Shanghai Synchrotron Radiation Facility (SSRF) and the Dragon-I induction linac. The Beijing Radioactive Ion Facility (BRIF) and the China Spallation Neutron Source (CSNS) are under construction. In this paper, China’s accelerator projects are briefly reviewed and applications of accelerators are reported. The paper emphasizes spinoff of the accelerator technology developed during R&D and construction of the projects. Collaboration between academia and industry on the projects are described. With some examples, the benefits experienced in the laboratory-industry collaboration and approach of its economic impact are illustrated.

Slides WEIB04 [14.012 MB]

THPS088

LHC Beam Impact on Materials Considering the Time Structure of the Beam

3639

N.A. Tahir
GSI, Darmstadt, Germany
J. Blanco, R. Schmidt
CERN, Geneva, Switzerland
R. Piriz
Universidad de Castilla-La Mancha, Ciudad Real, Spain
A. Shutov
IPCP, Chernogolovka, Moscow region, Russia

The LHC is the world's largest and highest energy accelerator. Two counter-rotating beams can be accelerated up to 7 TeV and kept colliding for several hours. The energy stored in each beam is up to 362MJ, enough to melt 500 kg of copper. A fast loss of a small fraction of the beam can cause damage to a superconducting coil in a magnet. Primary beam collimators, one of the most robust parts of the machine protection, can be damaged with about 5% of the beam. An accident involving the entire beam is very unlikely but cannot be fully excluded. Understanding the consequences of such accidents is fundamental for the machine protection. Detailed numerical simulations have been carried out to assess the damage caused by full LHC beam impact on solid Cu and C cylinders. The energy loss of the protons is calculated with the FLUKA code and this data is used as input to a 2D hydrodynamic code BIG2, to study the thermodynamic and hydrodynamic response of the material. Since the target parameters change substantially during the time of impact, a new approach of running the two codes iteratively, has been developed. In this paper the results are presented and compared with the previous studies.

THPS090

Development of the Pulse Radiolysis System with a Supercontinuum Radiation using Photonic Crystal Fiber

3645

K.B. Ogata, R. Betto, Y. Hosaka, Y. Kawauchi, K. Sakaue, T. Suzuki, M. Washio
RISE, Tokyo, Japan
S. Kashiwagi
Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
R. Kuroda
AIST, Tsukuba, Ibaraki, Japan

Funding: Work supported by JSPS Grant-in-Aid for Scientific Research (A) 10001690
In usage of radiation, it is important to study the process of chemical effects of ionizing radiation in a material. Pulse radiolysis is a method to trace these rapid initial chemical reactions by ionizing radiation. As a pump beam, we are using 5MeV electron beam produced from the S-band photo cathode RF-Gun. In nanosecond timescale pulse radiolysis, it is required the stable probe light of a broad spectrum. And especially in picosecond timescale pulse radiolysis, probe light should have short pulse width to use stroboscopic method. Therefore, in order to develop a wide range of timescale experimental system, we have been developing a Supercontinuum (SC) light as a probe light, which is generated by nonlinear optical process of short pulse IR laser in photonic crystal fiber (PCF). As a result, the SC light spectrum is broad enough to use as a probe light. Then we tried to measure the absorption spectrum of hydrated electron by SC light, we successfully observed good signal-noise ratio data both nanosecond and picosecond experiment with unified pulse　radiolysis system. In this conference, we will report details of these results and future prospects.

THPS091

Scientific Feasibility of Fusion Material Irradiation Experiments in ESS-B

3648

I. Garcia-Cortes, A. Ibarra, R. Vila
CIEMAT, Madrid, Spain
E. Abad, R. Martinez
ESS Bilbao, Bilbao, Spain
F.J. Bermejo
Bilbao, Faculty of Science and Technology, Bilbao, Spain

Material irradiation by protons is capable of simulating the effects of fusion neutrons (14 MeV, target damaging and He & H production) with a reasonably fast dose rate, according to theoretical calculations and previous experiments. Therefore, given that the ESS-Bilbao (ESS-B) accelerator, under construction in Bilbao, will provide an intense source of 50 MeV protons, with total currents of a few mA’s, a laboratory for fusion material testing is proposed. This paper appraises the scientific feasibility of performing fusion relevant experiments in the proposed laboratory. Material characterization under proton irradiation (by in-beam techniques to assess mechanical properties) while monitoring mechanical, micro-structural and compositional changes of the irradiated materials are some of the laboratory goals. Special emphasis is placed on expected radiation damage parameters in structural and functional materials, the beam power deposition in the sample and the consequences of material activation for the laboratory design.

THPS092

Conceptual Design of the ESS-Bilbao Materials Irradiation Laboratory

3651

R. Martinez, E. Abad
ESS Bilbao, Bilbao, Spain
F.J. Bermejo
Bilbao, Faculty of Science and Technology, Bilbao, Spain
I. Garcia-Cortes, A. Ibarra, R. Vila
CIEMAT, Madrid, Spain

Funding: ESS-Bilbao
The baseline design for the first stage of the ESS-Bilbao proton linear accelerator up to 50 MeV is almost concluded and the linac is at present under construction. Three main application laboratories have been envisaged in this first stage: two proton irradiation laboratories and a low intensity neutron source. In particular, the high intensity proton beam of 50 MeV will be used to test structural materials for fusion reactors* under project named “Protons for Materials” (P4M), described in this contribution. The P4M irradiation room will be an underground facility located at the accelerator's tunnel depth. High levels of activation are expected in this irradiation room and its design presents challenges in both remote handling and independent operation from the other two surface laboratories. Thermal analysis of the beam power deposition over the target will be presented.
K. Konashyetal, Sci. Rep. RITU, A45(1997), pp.111-114.

Paper	Title	Page
WEIB04	Accelertor-based Mega-science Projects in China and Their Impact on Economy	1986
	C. Zhang IHEP Beijing, Beijing, People's Republic of China
	Along with the rapid development of national economy in China, a number of accelerator based mega-science projects were constructed, such as the Beijing Electron-Positron Colliders (BEPC) and its major upgrade project (BEPCII), the Hefei Light Source (HLS), the Heavy Ion Research Facility in Lanzhou (HIRFL) and its Cooling Storage Rings (HIEFL-CSR), the Shanghai Synchrotron Radiation Facility (SSRF) and the Dragon-I induction linac. The Beijing Radioactive Ion Facility (BRIF) and the China Spallation Neutron Source (CSNS) are under construction. In this paper, China’s accelerator projects are briefly reviewed and applications of accelerators are reported. The paper emphasizes spinoff of the accelerator technology developed during R&D and construction of the projects. Collaboration between academia and industry on the projects are described. With some examples, the benefits experienced in the laboratory-industry collaboration and approach of its economic impact are illustrated.
	Slides WEIB04 [14.012 MB]

THPS088	LHC Beam Impact on Materials Considering the Time Structure of the Beam	3639
	N.A. Tahir GSI, Darmstadt, Germany J. Blanco, R. Schmidt CERN, Geneva, Switzerland R. Piriz Universidad de Castilla-La Mancha, Ciudad Real, Spain A. Shutov IPCP, Chernogolovka, Moscow region, Russia
	The LHC is the world's largest and highest energy accelerator. Two counter-rotating beams can be accelerated up to 7 TeV and kept colliding for several hours. The energy stored in each beam is up to 362MJ, enough to melt 500 kg of copper. A fast loss of a small fraction of the beam can cause damage to a superconducting coil in a magnet. Primary beam collimators, one of the most robust parts of the machine protection, can be damaged with about 5% of the beam. An accident involving the entire beam is very unlikely but cannot be fully excluded. Understanding the consequences of such accidents is fundamental for the machine protection. Detailed numerical simulations have been carried out to assess the damage caused by full LHC beam impact on solid Cu and C cylinders. The energy loss of the protons is calculated with the FLUKA code and this data is used as input to a 2D hydrodynamic code BIG2, to study the thermodynamic and hydrodynamic response of the material. Since the target parameters change substantially during the time of impact, a new approach of running the two codes iteratively, has been developed. In this paper the results are presented and compared with the previous studies.

THPS090	Development of the Pulse Radiolysis System with a Supercontinuum Radiation using Photonic Crystal Fiber	3645
	K.B. Ogata, R. Betto, Y. Hosaka, Y. Kawauchi, K. Sakaue, T. Suzuki, M. Washio RISE, Tokyo, Japan S. Kashiwagi Tohoku University, Research Center for Electron Photon Science, Sendai, Japan R. Kuroda AIST, Tsukuba, Ibaraki, Japan
	Funding: Work supported by JSPS Grant-in-Aid for Scientific Research (A) 10001690 In usage of radiation, it is important to study the process of chemical effects of ionizing radiation in a material. Pulse radiolysis is a method to trace these rapid initial chemical reactions by ionizing radiation. As a pump beam, we are using 5MeV electron beam produced from the S-band photo cathode RF-Gun. In nanosecond timescale pulse radiolysis, it is required the stable probe light of a broad spectrum. And especially in picosecond timescale pulse radiolysis, probe light should have short pulse width to use stroboscopic method. Therefore, in order to develop a wide range of timescale experimental system, we have been developing a Supercontinuum (SC) light as a probe light, which is generated by nonlinear optical process of short pulse IR laser in photonic crystal fiber (PCF). As a result, the SC light spectrum is broad enough to use as a probe light. Then we tried to measure the absorption spectrum of hydrated electron by SC light, we successfully observed good signal-noise ratio data both nanosecond and picosecond experiment with unified pulse　radiolysis system. In this conference, we will report details of these results and future prospects.

THPS091	Scientific Feasibility of Fusion Material Irradiation Experiments in ESS-B	3648
	I. Garcia-Cortes, A. Ibarra, R. Vila CIEMAT, Madrid, Spain E. Abad, R. Martinez ESS Bilbao, Bilbao, Spain F.J. Bermejo Bilbao, Faculty of Science and Technology, Bilbao, Spain
	Material irradiation by protons is capable of simulating the effects of fusion neutrons (14 MeV, target damaging and He & H production) with a reasonably fast dose rate, according to theoretical calculations and previous experiments. Therefore, given that the ESS-Bilbao (ESS-B) accelerator, under construction in Bilbao, will provide an intense source of 50 MeV protons, with total currents of a few mA’s, a laboratory for fusion material testing is proposed. This paper appraises the scientific feasibility of performing fusion relevant experiments in the proposed laboratory. Material characterization under proton irradiation (by in-beam techniques to assess mechanical properties) while monitoring mechanical, micro-structural and compositional changes of the irradiated materials are some of the laboratory goals. Special emphasis is placed on expected radiation damage parameters in structural and functional materials, the beam power deposition in the sample and the consequences of material activation for the laboratory design.

THPS092	Conceptual Design of the ESS-Bilbao Materials Irradiation Laboratory	3651
	R. Martinez, E. Abad ESS Bilbao, Bilbao, Spain F.J. Bermejo Bilbao, Faculty of Science and Technology, Bilbao, Spain I. Garcia-Cortes, A. Ibarra, R. Vila CIEMAT, Madrid, Spain
	Funding: ESS-Bilbao The baseline design for the first stage of the ESS-Bilbao proton linear accelerator up to 50 MeV is almost concluded and the linac is at present under construction. Three main application laboratories have been envisaged in this first stage: two proton irradiation laboratories and a low intensity neutron source. In particular, the high intensity proton beam of 50 MeV will be used to test structural materials for fusion reactors* under project named “Protons for Materials” (P4M), described in this contribution. The P4M irradiation room will be an underground facility located at the accelerator's tunnel depth. High levels of activation are expected in this irradiation room and its design presents challenges in both remote handling and independent operation from the other two surface laboratories. Thermal analysis of the beam power deposition over the target will be presented. K. Konashyetal, Sci. Rep. RITU, A45(1997), pp.111-114.