CYCLOTRONS 2010 - List of Authors (Machicoane, G.)

Paper

Title

Page

Intense Beam Operation of the NSCL/MSU Cyclotrons

27

J.W. Stetson, G. Machicoane, F. Marti, D.R. Poe
NSCL, East Lansing, Michigan, USA

Funding: Supported under National Science Foundation under grant No. PHY06-06007
Intense heavy ion beam acceleration by superconducting compact cyclotrons presents significant challenges since surfaces impacted by lost beam are subject to high thermal loads and consequent damage. High transmission efficiencies allow 0.7-1.0 kW beams to be routinely delivered for experiment at the NSCL, with minimal negative impact on reliability. Net beam transmission measured from just before the K500 to extracted beam from the K1200 can be about 30% depending on the ion used (factoring out the unavoidable loss due to the charge stripping foil in the K1200). Techniques and examples are discussed.

Slides MOA1CIO01 [4.425 MB]

WEM1CIO04

Transverse Collimation with the Superconducting ECR Ion Source SuSI at the Coupled Cyclotron Facility

G. Machicoane, D.G. Cole, M. Doleans, T. Ropponen, J.W. Stetson, L.T. Sun, X. Wu
NSCL, East Lansing, Michigan, USA

The Coupled Cyclotron Facility (CCF) at Michigan State University has replaced the old 6.4 GHz Superconducting ECR ion source SCECR with SuSI, a fully Superconducting ECR ion source operating at 18 GHz. The installation of SUSI was completed in September 2009 and since that time the ion source has been routinely used for CCF operation. Prior to the ion source installation to the cyclotron, the initial period of commissioning of SuSI had shown very solid performances for medium charge state ion beams. For example more than 300 eμA of Xe²⁰⁺ and 400 eμA of Kr¹³⁺ have been obtained. However large increase in extracted ion beam current from the ECR ion source will not necessary translate into higher primary beam power on the production target. To optimize the brightness of the beam injected into the K500, a beam collimation scheme has been developed that limit the beam transverse emittance and includes several apertures and solenoids to implement successive cuts to the beam phase space distribution. In this contribution, an overview of the ion source SuSI will be presented. Experimental results from the collimation channel will also be presented and will be compared to simulations.

Slides WEM1CIO04 [4.486 MB]

Paper	Title	Page
MOA1CIO01	Intense Beam Operation of the NSCL/MSU Cyclotrons	27
	J.W. Stetson, G. Machicoane, F. Marti, D.R. Poe NSCL, East Lansing, Michigan, USA
	Funding: Supported under National Science Foundation under grant No. PHY06-06007 Intense heavy ion beam acceleration by superconducting compact cyclotrons presents significant challenges since surfaces impacted by lost beam are subject to high thermal loads and consequent damage. High transmission efficiencies allow 0.7-1.0 kW beams to be routinely delivered for experiment at the NSCL, with minimal negative impact on reliability. Net beam transmission measured from just before the K500 to extracted beam from the K1200 can be about 30% depending on the ion used (factoring out the unavoidable loss due to the charge stripping foil in the K1200). Techniques and examples are discussed.
	Slides MOA1CIO01 [4.425 MB]

WEM1CIO04	Transverse Collimation with the Superconducting ECR Ion Source SuSI at the Coupled Cyclotron Facility
	G. Machicoane, D.G. Cole, M. Doleans, T. Ropponen, J.W. Stetson, L.T. Sun, X. Wu NSCL, East Lansing, Michigan, USA
	The Coupled Cyclotron Facility (CCF) at Michigan State University has replaced the old 6.4 GHz Superconducting ECR ion source SCECR with SuSI, a fully Superconducting ECR ion source operating at 18 GHz. The installation of SUSI was completed in September 2009 and since that time the ion source has been routinely used for CCF operation. Prior to the ion source installation to the cyclotron, the initial period of commissioning of SuSI had shown very solid performances for medium charge state ion beams. For example more than 300 eμA of Xe²⁰⁺ and 400 eμA of Kr¹³⁺ have been obtained. However large increase in extracted ion beam current from the ECR ion source will not necessary translate into higher primary beam power on the production target. To optimize the brightness of the beam injected into the K500, a beam collimation scheme has been developed that limit the beam transverse emittance and includes several apertures and solenoids to implement successive cuts to the beam phase space distribution. In this contribution, an overview of the ion source SuSI will be presented. Experimental results from the collimation channel will also be presented and will be compared to simulations.
	Slides WEM1CIO04 [4.486 MB]