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RIS citation export for FRB1: Axial X-Ray Cutoff in Small, Dense Plasma in the VENUS ECR

TY - UNPB
AU - Benitez, J.Y.
AU - Lyneis, C.M.
AU - Todd, D.S.
AU - Xie, D.
ED - Schaa, Volker RW
ED - Pisciotta, Pietro
TI - Axial X-Ray Cutoff in Small, Dense Plasma in the VENUS ECR
J2 - Proc. of ECRIS2018, Catania, Italy, 10-14 September 2018
C1 - Catania, Italy
T2 - International Workshop on ECR Ion Sources
T3 - 23
LA - english
AB - The coil structure of the superconducting ECR ion source VENUS allows for considerable control over the plasma-confining magnetic field while investigating axially-emitted x-rays from the source. Generally, it is found that axial x-ray intensity increases with input RF power. However, when the minimum field at the source center is relatively high this increase with power is only over a limited range. Past this range there is a sudden decrease in x-ray intensity followed by a complete disappearance of axial x-rays for any further input heating. As ion beams are still extracted, it is clear that plasma is still present. We will present measured data in the forms of x-ray spectra, extracted beam currents, and transmitted and reflected microwave power to explore the possibility that the plasma may have reach critical density on axis and effectively turned off RF heating in this region.
PB - JACoW Publishing
CP - Geneva, Switzerland
ER -