Accession Number : AD0800035

Title :   CYCLOTRON RESONANCE PUMPING OF GAS LASERS.

Descriptive Note : Final rept. 1 Jun 65-30 May 66,

Corporate Author : RADIO CORP OF AMERICA PRINCETON NJ ASTRO-ELECTRONICS DIV

Personal Author(s) : Ahmed, S. ; Faith, T.

Report Date : SEP 1966

Pagination or Media Count : 35

Abstract : Experiments employing pure d-c pumping and combined d-c/microwave pumping were performed on argon lasers. The effort was directed toward obtaining a basic understanding of the laser discharge dynamics for the d-c case and its effects on laser output and efficiency. From this basis the study progressed to investigation of the effects of various d-c/microwave pumping combinations on discharge behavior and laser operation. These experiments showed that for low-wall-loss magnetically confined d-c discharges, the gas pressure in the laser tube is greatly reduced by ion-drift pumping towards the cathode and laser action takes place at considerably lower pressure than had hitherto been supposed. In addition for the case of c-w operation this ion pumping causes a considerable pressure gradient along the tube, the pressure dropping from cathode to anode. This means that optimum pressure for laser operation exists only near the anode, the result being a lower laser output. In the first year's work emphasis was placed on the definition of parameters leading to efficient high-power laser operation.

Descriptors :   (*LASERS, ARGON), (*PUMPING(ELECTRONICS), DIRECT CURRENT), CYCLOTRON RESONANCE PHENOMENA, MICROWAVE FREQUENCY, EFFECTIVENESS, OPTIMIZATION, MAGNETIC FIELDS, ELECTROMAGNETIC PULSES, RELAXATION TIME, COOLING, TRANSIENTS, EXCITATION, IONIZATION, GAS IONIZATION, GAS DISCHARGES, IONS, ELECTRONS.

Subject Categories : Lasers and Masers
      Nuclear Physics & Elementary Particle Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE