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Construction of the EBIS-C Beamline Eli Parke…KSU Senior…REU 2006 and Future Experiments

Construction of the EBIS-C Beamline

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Construction of the EBIS-C Beamline. Eli Parke…KSU Senior…REU 2006. and Future Experiments. Introduction. -Purpose/Motivation -Design and Construction -Status -Future Plans. What is EBIS?. EBIS – a plasma device designed to generate highly-charged ions at low velocity - PowerPoint PPT Presentation

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Construction of the EBIS-C Beamline

Eli Parke…KSU Senior…REU 2006

and Future Experiments

Introduction

-Purpose/Motivation

-Design and Construction

-Status

-Future Plans

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

Pretty Pictures

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?