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RESEARCH PRODUCT
The laser and optical system for the RIBF-PALIS experiment
Hideki TomitaTetsu SonodaH. IimuraIchiro KatayamaMichiharu WadaT. M. KojimaVolker SonnenscheinMikael ReponenTakahide Takamatsusubject
Nuclear and High Energy PhysicsspektroskopiaPhysics::Optics01 natural sciencesBeam parameter productlaw.inventionVertical-cavity surface-emitting laserLaser linewidthOpticslaw0103 physical sciencesPhysics::Atomic PhysicsLaser power scaling010306 general physicsInstrumentationPhysicsDistributed feedback laserta114010308 nuclear & particles physicsbusiness.industryFar-infrared lasergas cellLaserlasertekniikkaLaser Ion Sourcegas jetlaser spectroscopyPhysics::Accelerator PhysicsLaser beam qualitylaser resonance ionizationbusinessydinfysiikkadescription
Abstract This paper describes the laser and optical system for the Parasitic radioactive isotope (RI) beam production by Laser Ion-Source (PALIS) in the RIKEN fragment separator facility. This system requires an optical path length of 70 m for transporting the laser beam from the laser light source to the place for resonance ionization. To accomplish this, we designed and implemented a simple optical system consisting of several mirrors equipped with compact stepping motor actuators, lenses, beam spot screens and network cameras. The system enables multi-step laser resonance ionization in the gas cell and gas jet via overlap with a diameter of a few millimeters, between the laser photons and atomic beam. Despite such a long transport distance, we achieved a transport efficiency for the UV laser beam of about 50%. We also confirmed that the position stability of the laser beam stays within a permissible range for dedicated resonance ionization experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |