0000000000199801

AUTHOR

Ichiro Katayama

showing 3 related works from this author

The laser and optical system for the RIBF-PALIS experiment

2017

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 an…

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 ionizationbusinessydinfysiikkaNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
researchProduct

A simple method for counting the number of trapped ions in an ion trap

1996

The number of stored Ca\(^+\) ions in an ion trap was measured optically by utilizing the metastable states. All the ions trapped are first pumped into the metastable \(D\) states. The ions in the metastable \(D\) states are transferred to the ground \(S\) state via the \(P\) state by exciting a \(D\rightarrow P\) transition. Each ion then emits one photon through a subsequent \(P\rightarrow S\) spontaneous emission. Thus, the number of photons is the same as the number of trapped ions initially in the metastable states. When a fraction of all the stored ions are pumped into the metastable states, the method is still applicable if the fraction of the ions is known.

PhysicsQuantum opticsSIMPLE (dark matter experiment)PhotonPhysics and Astronomy (miscellaneous)Other Fields of PhysicsGeneral EngineeringGeneral Physics and AstronomyIonPhysics::Plasma PhysicsMetastabilitySpontaneous emissionPhysics::Atomic PhysicsIon trapAtomic physicsApplied Physics B: Lasers and Optics
researchProduct

Laser-microwave spectroscopy of the hyperfine structure of 9Be for the investigation of unstable Be isotopes

1997

Abstract For an investigation concerning the nuclear magnetic moments and their distributions in the nuclei of 7,11Be, an experimental project using laser-microwave double resonance spectroscopy for trapped ions is under progress at INS. Laser cooled ion crystals consisting of a few 9Be+ ions were observed and the ground state hyperfine splitting of 9Be+ was measured with a precision of 10−5. Experiments on the unstable isotope 7Be have been started.

PhysicsNuclear and High Energy PhysicsMagnetic momentResonanceLaserIonlaw.inventionlawPhysics::Atomic PhysicsRotational spectroscopyAtomic physicsGround stateSpectroscopyHyperfine structureNuclear PhysicsNuclear Physics A
researchProduct