From laser acceleration to a laser proton accelerator (Conference Presentation)

2019 ◽  
Author(s):  
Xueqing Yan ◽  
Jungao Zhu ◽  
Qing Liao ◽  
Yixing Geng ◽  
Jiaer Chen ◽  
...  
Keyword(s):  
Proton Accelerator ◽  
Laser Acceleration

Developments of a multiplexer system for the High-Brilliance Neutron Source HBS

2021 ◽  
pp. 1-14
Author(s):  
Marius Rimmler ◽  
Olaf Felden ◽  
Ulrich Rücker ◽  
Helmut Soltner ◽  
Paul Zakalek ◽  
...  
Keyword(s):  
Neutron Source ◽  
Test Facility ◽  
Proton Accelerator ◽  
Neutron Beams ◽  
Time Structures ◽  
Pulse Structure ◽  
Main Components

The High-Brilliance Neutron Source project (HBS) aims at developing a medium-flux accelerator-driven neutron source based on a 70 MeV, 100 mA proton accelerator. The concept optimizes the facility such that it provides high-brilliance neutron beams for instruments operating at different time structures. This can be realized by generating an interlaced proton pulse structure, which is unraveled and sent to three different target stations by a multiplexer system. In the following we present the developments of a multiplexer system at the JULIC accelerator at Forschungszentrum Jülich GmbH (FZJ), which serves as test facility for HBS. The main components of the JULIC multiplexer system are designed to be scalable to the HBS parameters.

scholarly journals Optimized beam shaping assembly for a 2.1-MeV proton-accelerator-based neutron source for boron neutron capture therapy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pablo Torres-Sánchez ◽  
Ignacio Porras ◽  
Nataliya Ramos-Chernenko ◽  
Fernando Arias de Saavedra ◽  
Javier Praena
Keyword(s):  
Boron Neutron Capture Therapy ◽  
Neutron Capture ◽  
Beam Shaping ◽  
Proton Accelerator ◽  
Neutron Capture Therapy ◽  
Beam Shape ◽  
New Era ◽  
Boron Neutron Capture ◽  
Optimal Beam ◽  
Beam Shaping Assembly

AbstractBoron Neutron Capture Therapy (BNCT) is facing a new era where different projects based on accelerators instead of reactors are under development. The new facilities can be placed at hospitals and will increase the number of clinical trials. The therapeutic effect of BNCT can be improved if a optimized epithermal neutron spectrum is obtained, for which the beam shape assembly is a key ingredient. In this paper we propose an optimal beam shaping assembly suited for an affordable low energy accelerator. The beam obtained with the device proposed accomplishes all the IAEA recommendations for proton energies between 2.0 and 2.1 MeV. In addition, there is an overall improvement of the figures of merit with respect to BNCT facilities and previous proposals of new accelerator-based facilities.

The Production of 52Fe by Means of a Medium Energy Proton Accelerator

1990 ◽  
Vol 50 (1-2) ◽  
Author(s):  
Peter Smith-Jones ◽  
Rolf Schwarzbach ◽  
Regin Weinreich
Keyword(s):  
Proton Accelerator ◽  
Medium Energy ◽  
Energy Proton

Nanooptics and electrons: From strong-field physics at needle tips to dielectric laser acceleration

2014 ◽  
Author(s):  
Michael Kruger ◽  
Sebastian Thomas ◽  
John Breuer ◽  
Michael Forster ◽  
Dominik Ehberger ◽  
...  
Keyword(s):  
Strong Field ◽  
Strong Field Physics ◽  
Laser Acceleration

Laser acceleration and injection of particles in optically shaped gas targets

2013 ◽  
Author(s):  
Daniel F. Gordon ◽  
Michael H. Helle ◽  
Dmitri Kaganovich ◽  
Antonio Ting ◽  
Bahman Hafizi
Keyword(s):  
Laser Acceleration ◽  
Gas Targets

scholarly journals Neutron diffractometer covering protein crystals with large unit cell at J-PARC

2014 ◽  
Vol 70 (a1) ◽  
pp. C1746-C1746
Author(s):  
Kazuo Kurihara ◽  
Katsuaki Tomoyori ◽  
Taro Tamada ◽  
Ryota Kuroki
Keyword(s):  
Cell Volume ◽  
Unit Cell Volume ◽  
Structural Information ◽  
Unit Cell ◽  
Proton Accelerator ◽  
Neutron Guide ◽  
Time Dimension ◽  
Hydrogen Atoms ◽  
Large Unit ◽  
Large Unit Cell

The structural information of hydrogen atoms and hydration waters obtained by neutron protein crystallography is expected to contribute to elucidation of protein function and its improvement. However, many proteins, especially membrane proteins and protein complexes, have larger molecular weight and then unit cells of their crystals have larger volume, which is out of range of measurable unit cell volume for conventional diffractometers. Therefore, our group had designed the diffractometer which can cover such crystals with large unit cell volume (target lattice length: 250 Å). This diffractometer is dedicated for protein single crystals and has been proposed to be installed at J-PARC (Japan Proton Accelerator Research Complex). Larger unit cell volume causes a problem to separate spots closer to each other in spatial as well as time dimension in diffraction images. Therefore, our proposed diffractometer adopts longer camera distance (L2 = 800mm) and selects decoupled hydrogen moderator as neutron source which has shorter pulse width. Under the conditions that L1 is 33.5m, beam divergence 0.40and crystal edge size 2mm, this diffractometer is estimated to be able to resolves spots diffracted from crystals with a lattice length of 220 Å in each axis at d-space of 2.0 Å. In order to cover large neutron detecting area due to long camera distance, novel large-area detector (larger than 300mm × 300mm) with a spatial resolution of better than 2.5mm is under development. More than 40 these detectors plan to be installed, providing the total solid angle coverage of larger than 33%. For neutron guide, ellipsoidal supermirror is considered to be adopted to increase neutron flux at the sample position. The final gain factor of this diffractometer is estimated to be about 20 or larger as compared with BIX-3/4 diffractometers operated in the research reactor JRR-3 at JAEA (Japan Atomic Energy Agency) [1,2].

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