Er:YAG and Ho:YAG laser beams were combined to irradiate hard tissues to achieve highly efficient ablation with low laser power. The delay time between pulses of the two lasers was controlled to irradiate alumina ceramic balls used as hard tissue models. With optimized delay time, the combined laser beam perforated the sample 40% deeper than independent radiation by either an Er:YAG or Ho:YAG l...

Laser-wakefield accelerators (LWFA) can produce electric fields of order 10-100 GV/m suitable for acceleration of electrons to relativistic energies. The wakefields are excited by a relativistically intense laser pulse propagating through a plasma and have a phase velocity determined by the group velocity of the light pulse. Two important effects that can limit the acceleration distance and hen...

The KEK Accelerator test facility (ATF) [1] extraction line laser-wire system has been upgraded last year allowing the measurement of micron scale transverse size electron beams. The most recent measurements using the upgraded system are presented. The ATF-II extraction line design [2] call for the major upgrade of the existing laser-wire system. We report on the hardware upgrades, including th...

Laser‐plasma interactions in the novel regime of relativistically‐induced transparency have been harnessed to generate ef iciently intense ion beams with average energies exceeding 10 MeV/nucleon (> 100 MeV for protons) at 'table‐top' scales. High‐intensity is possible because these beams are neutralized and therefore immune to the space‐charge and current limits of conventional beams. We have ...

In this paper we present a 3D laser pulse shaping scheme that can be applied for generating ellipsoidal electron bunches from a photoinjector. The 3D shaping is realized through laser phase tailoring in combination with chromatic aberration in a focusing optics. Performance of an electron beam generated from such shaped laser pulses is compared with that of a uniforma ellipsoidal, a uniform cyl...

We propose a support system of range data acquisition by a laser rangefinder for wide area outdoor modeling in order to reduce un-observed portions of generated model. The system presents the operator a recommendation degree map which illustrates recommendation position of acquisition of range data in the objective area. The operator decides a next acquisition position in consideration of movem...

ISOLDE’s Offline 2 laboratory has been upgraded to facilitate development for the production and study of molecular ion beams. New gas injection systems have implemented both formation in source radio-frequency quadrupole trap used beam preparation. MagneToF detectors time-resolved single counting data acquisition low intensity beams studies laser-atom or laser-molecule interactions. We present...

To improve the stability and reproducibility of laser wakefield accelerators and to allow for future applications, controlling the injection of electrons is of great importance. This allows us to control the amount of charge in the beams of accelerated electrons and final energy of the electrons. Results are presented from a recent experiment on controlled injection using the scheme of collidin...

Calcium and lithium ion beams are required by NASA Space Radiation Laboratory at Brookhaven National Laboratory to simulate the effects of cosmic radiation. To identify the difficulties in providing such highly reactive materials as laser targets, both species were experimentally tested. Plate shaped lithium and calcium targets were fabricated to create ablation plasmas with a 6 ns 1064 nm neod...