Post on 31-Dec-2015
description
What is EBIS?
• EBIS – a plasma device designed to generate highly-charged ions at low velocity
• C – beamlines are designated in alphabetical order
• For more information, see http://jrm.phys.ksu.edu/cryebis.html or google the article “Historical Review of electron beam ion sources,” E.D. Donets, Review of Scientific Instruments 66,2 (1998)
Target Projectile Physics
CO Ar11+ Decay Mechanisms in Double-Electron Capture
Ar Collision-Induced Dissociation, Dissociative Capture
He Vibrational State Effects
Motivation
Versatile Beamline For Multiple Associated Experiments
HD,H2
2H
The Physics
*2*911 COArCOAr
Double Electron Capture
)O(CorCOCO 2*2
)e(ArorArAr 109*9
Decay Mechanisms
KERKinetic Energy of Release – breakup of CO
•Autoionizing states associated with lower KER
•Stable states associated with approx. Coulomb repulsion energy
Construction Plans
FC
FC
××××
××××××
4-jaw slits
Wien Filter
Molecular ion source
Einzel lens
x/y-steerers
Beam viewer
Accelerating column
Deflectors
Cold Jet &Spectrometer
EBIS Beam
Pressure reducer
FCx/y-steerers
EBIS Beam line plan – C
Switching magnet
Beam Energy Analyzer
Einzel lens Detector
Pressure reducer
ElectrostaticQuad
Movable“Target” cell
Einzel lens
Status
Stage Components Progress
1 Ion Optics, Beam Viewers (2)
Complete
2 Target Cell, Beam Energy Analyzer
Ready
3 Spectrometer, Deflectors Ready
4 Detector Design
Delays
Bending the ion beam•Gas cell on stage 3 has very small aperture
•Inconsistent current with poor focus
•Switching from Helium to Hydrogen
Distractions
• Other experiments: GSD resonance, bond rearrangement, CEP
• Time of Flight Calculator
Future Plans
• Finish assembling spectrometer
• Modify detector chamber/flange
• Try bending hydrogen beam
• Goal: have stages 2&3 built by end of August?
The Group