1 / 6

High-Resolution Time-of-Flight Spectrometer for Fast Neutrons

What ? Why ? How ? Who ?. Letter of Intent. High-Resolution Time-of-Flight Spectrometer for Fast Neutrons. JRA - Proposal: Development of a next-generation detection system for high-energy neutron Performance goals: - Very good time-of-flight resolution (<100 psec)

borka
Télécharger la présentation

High-Resolution Time-of-Flight Spectrometer for Fast Neutrons

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What ? Why ? How ? Who ? Letter of Intent High-Resolution Time-of-Flight Spectrometer for Fast Neutrons JRA - Proposal: Development of a next-generation detection system for high-energy neutron Performance goals: - Very good time-of-flight resolution (<100 psec) - Good spatial resolution (<1 cm in all three dimensions) - High detection efficiency (>90%) - Good neutron recognition / multi-hit capabilities Improving the R3B experimental facility at GSI

  2. The R3B facility @GSI Mixed beam Charged fragments ToF, DE LAND tracking → Br ~ A/Qbg Neutrons ToF, x, y, z ~12 m projectile tracking Photons ALADIN large-acceptance dipole Crystal Ball and Target Beam Excitation energy E*from kinematically complete measurement of all outgoing particles:

  3. The Large Area Neutron Detector LAND Efficiency 1 Resolution:sTof ~ 250 ps sp ~ 5 - 10 MeV/c sIVM ~ 0.2 - 1. MeV Nucl. Instr. Meth. A314 (1992) 136 Neutron Energy (MeV)

  4. Physics Motivation A large number of physics programs (and users) will benefit (fragmentation beams, reaccelerated beams, >50 A MeV) Some experiments critically depend on the improved performance - Inelastic excitation of radioactive nuclei elm excitation, multipole response, new collective modes - Quasi-free scattering in particular (p,pn) reactions, n detector at 45 degree → resolution !!! single-particle structure, nucleon-nucleon correlations, in-medium effects - Astrophysical reaction rates (g,n) cross sections at very low excitation energy →resolution !!! - Nuclear states beyond the driplines e.g. multi-neutron clusters → multi-hit recognition capability !!! - The asymmetry energy and the nuclear/neutron Equation of State pygmy dipole, n-skin, neutron flow measurements ... - Kinematical complete measurements of fission and spallation reactions What ? Why ? How ? Who ?

  5. Research and Development Program Idea: Converter principle plus RPC – based charged particle detection (modular detector, >10000 channels, >100 m2 RPC) RPCs have been used for detection of minimum-ionizing light charged particles Time resolution in the order of 50 psec has been reached Activities: Understanding of the reaction mechanisms/hadronic shower properties and their simulation Simulation of possible detector concepts and their optimization Study of detections principles, alternatives to converter/charged-particle principle Detection of low-energy charged particles with RPCs (efficiency, resolution) Development of prototype modules and tests Development of a cost-effective readout scheme providing excellent time resolution Final deliverable: Prototype (20% detector) What ? Why ? How ? Who ?

  6. Collaboration Participants and Expertise GSI KVI Groningen ISS Bucharest Jagellonian University Krakow Universidad Santiago de Compostela CEA Saclay University Frankfurt University Mainz TU Darmstadt University Köln FZ Rossendorf Associated Partners: Saha Institute, Kolkata; Tokyo Institute of Technology What ? Why ? How ? Who ? Collaboration will bring in manpower, laboratory infrastructure, plus all investment costs

More Related