Several-MeV γ-ray generation at NewSUBARU by laser Compton backscattering

Amano, Sho; Horikawa, Ken; Ishihara, K.; Miyamoto, Shuji; Hayakawa, Takehito; Shizuma, T.; Mochizuki, Takayasu

doi:10.1016/j.nima.2009.01.010

Cited by 83 publications

(53 citation statements)

References 15 publications

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“…A beam campaign is scheduled for November 2014 at the NewSUBARU [14] accelerator. This will allow to check the expected angular resolution and sensitivity to polarisation for photons from 4 to 76 MeV, and get benchmarks for a simulation of the detector.…”

Section: Discussionmentioning

confidence: 99%

HARPO - TPC for High Energy Astrophysics and Polarimetry from the MeV to the TeV

Gros

2015

Proceedings of Technology and Instrumentation in Particle Physics 2014 — PoS(TIPP2014)

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Observation of high-energy sources requires gamma-ray telescopes aboard balloons or satellites to study non thermal phenomena (black holes, neutron stars, active galactic nuclei, supernovae, supernova remnants, and gamma-ray bursts). In recent years, R&D has been mainly active to improve the sensitivity required for polarimetry. In this context, a concept of a Time Projection Chamber (TPC) was proposed as an active target and pair production imager with a high angular resolution and background reduction capabilities. After introducing the HARPO TPC and its potential as gamma-ray telescope, we present the characterization of the TPC readout plane which provides gas electron amplification within a microstructure composed of the association of a Micromegas and Gas Electron Multiplier. Recent results using cosmic-ray events are shown and finally the beam test, scheduled this year, with polarized photon at MeV energy will be discussed.

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Section: Discussionmentioning

confidence: 99%

HARPO - TPC for High Energy Astrophysics and Polarimetry from the MeV to the TeV

Gros

2015

Proceedings of Technology and Instrumentation in Particle Physics 2014 — PoS(TIPP2014)

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“…The photoneutron measurements performed on seven Sm isotopes [5] using quasimonochromatic γ-rays at the beam line GACKO of the synchrotron radiation facility New-SUBARU [6,7] is part of that experimental campaign. LCS γ-ray beams up to 13 MeV maximum energy were produced by Compton scattering of Nd:YVO 4 laser photons on electrons with energies between 573 and 850 MeV.…”

Section: Preparatory Experimentsmentioning

confidence: 99%

Photoneutron cross section measurements on Sm isotopes

Filipescu

Utsunomiya

Camera

et al. 2015

EPJ Web of Conferences

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Abstract.The Extreme Light Infrastructure -Nuclear Physics, one of the three pillars of the Extreme Light Infrastructure Pan-European initiative, is a new large scale facility dedicated to nuclear physics with extreme electromagnetic fields. ELI-NP will host two 10 PW lasers and a very brilliant Gamma beam system with unprecedented intensity and energy resolution parameters. We propose to perform photon induced nuclear reactions using the very brilliant γ-ray beams provided by the Gamma beam system to examine in detail the photon absorption process and its decay modes. Here the experimental program related to nuclear research on reactions above the neutron separation threshold, which is under preparation at ELI-NP, is presented.

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“…LCS gamma rays an energy of 16.7 MeV have been generated from laser light with a wavelength of 1064 nm from a Nd: YVO 4 laser, which has a power output of 4.5 W, and 1 GeV (200 mA) electron beam circulating in the storage ring [15]. The energy of the LCS gamma rays E γ was calculated by the scattering energy conservation using the following equation [16,17]: where g is a relativestic coefficient, c is the velocity of the light, E L is the energy of laser photon, E k is the kinetic energy of the electron, m e is the rest mass of the electron and θ is the scattering angle of the scattered photon against the direction of the electron. The generation rate of LCS gamma rays is about 10 5 MeV −1 · s −1 [18].…”

Section: Generation Of Positronmentioning

confidence: 99%

Production of positrons via pair creation from LCS gamma-rays and application to defect study in bulk materials

Hori

Ishii²,

Ishiyama³

et al. 2014

Proc. 2nd Japan-China Joint Workshop on Positron Science

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A new positron production and measurement apparatus has been developed at a synchrotron radiation facility. Highly energetic positrons were created via pair creation in a Pb target by implantation of 16.7 MeV photons generated via inverse Compton scattering of a Nd laser beam from a 1 GeV electron beam circulating in the storage ring at the NewSUBARU synchrotron radiation facility. These positrons, with an energy of around 8 MeV, are separated using a magnetic field and directly implanted into a thick sample to detect defects. By using laser Compton scattered (LCS) photon generated positrons, we performed positron annihilation Doppler broadening measurement for fatigue stress applied iron with a thickness of 2 mm. Vacancy type defects in nondestructive fatigue stress applied iron specimens were successfully detected by this LCS-positron apparatus.

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Several-MeV γ-ray generation at NewSUBARU by laser Compton backscattering

Cited by 83 publications

References 15 publications

HARPO - TPC for High Energy Astrophysics and Polarimetry from the MeV to the TeV

HARPO - TPC for High Energy Astrophysics and Polarimetry from the MeV to the TeV

Photoneutron cross section measurements on Sm isotopes

Production of positrons via pair creation from LCS gamma-rays and application to defect study in bulk materials

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