IPAC2011 - Classification: 03 Linear Colliders, Lepton Accelerators and New Acceleration Techniques / A12 FFAG, Cyclotrons

Paper	Title	Page
MOPZ037	Extension of the 3-spectrometer Beam Transport Line for the KAOS Spectrometer at MAMI and Recent Status of MAMI	880
	R.G. Heine, M. Dehn, K.-H. Kaiser, H.-J. Kreidel, U.L. Ludwig-Mertin IKP, Mainz, Germany
	Funding: Work supported by DFG (CRC443) and the German Federal State of Rhineland-Palatinate The institute for nuclear physics (KPH) at Mainz University is operating a 1.6 GeV c.w. microtron cascade (MAMI) for nuclear physics research. One of the vast experimental activities is electron scattering. A 3-spectrometer setup is used for cross-section measurements of hadron knock-out and meson production. The KAOS spectrometer magnet of GSI is installed there in parallel to detect particles from (e,e'K)reactions under small forward angles. So the primary electron beam has to transit the spectrometer and after this it has to hit the existing beam dump. Because of the existing experimental setup, this must be realised by deflecting the beam before the target that is rotated to be in line with the KAOS spectrometer's inlet. This paper will deal with the basic concept of a flexible beam transport line (BTL) magnet chicane for different KAOS forward angles, while keeping the forward beam direction for the 3-spectrometer setup untouched. A survey concept for assembly and adjustment of the BTL will be introduced, that is also useful for future adjustments of the target mount after target change. Results of the BTL commissioning and a general MAMI status will be presented as well.

MOPZ038	EMMA Injection and Extraction	883
	B.D. Muratori, J.K. Jones STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom Y. Giboudot Brunel University, Middlesex, United Kingdom D.J. Holder The University of Liverpool, Liverpool, United Kingdom
	EMMA (Electron Machine with Many Applications) is a prototype non-scaling electron FFAG hosted at Daresbury Laboratory. NS-FFAGs related to EMMA have an unprecedented potential for medical accelerators for carbon and proton hadron therapy. They could also be used as the accelerator for a sub-critical reactor. We summarize the design and commissioning of both the injection and extraction lines for this machine. In particular, we look at the commissioning challenges of injection and extraction.

MOPZ039	Dispersion-free Regions and Insertions for EMMA	886
	B.D. Muratori, J.K. Jones STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	EMMA (Electron Machine with Many Applications) is a prototype non-scaling electron FFAG hosted at Daresbury Laboratory. Several upgrade possibilities for EMMA are explored, from creating a dispersion-free region in the ring to facilitate injection and extraction to making an insertion in EMMA by turning it into a racetrack-style machine. A dispersion-free region may be created in two separate ways. The first is by using a layout of EMMA which is naturally dispersion-free at the start and end of each cell. This means that we can arrange for periodic dispersion-free sections in every cell or in-between cells. The second is achieved through the use of sextupoles, by going off-axis in them, one has essentially a quadrupolar force which can be used to match the dispersion to zero in a particular place and for a particular energy. The benefits and drawbacks of both methods are discussed from the point of view of practicality and space in general, and applicability to EMMA in particular.

Paper

Title

Page

Extension of the 3-spectrometer Beam Transport Line for the KAOS Spectrometer at MAMI and Recent Status of MAMI

880

R.G. Heine, M. Dehn, K.-H. Kaiser, H.-J. Kreidel, U.L. Ludwig-Mertin
IKP, Mainz, Germany

Funding: Work supported by DFG (CRC443) and the German Federal State of Rhineland-Palatinate
The institute for nuclear physics (KPH) at Mainz University is operating a 1.6 GeV c.w. microtron cascade (MAMI) for nuclear physics research. One of the vast experimental activities is electron scattering. A 3-spectrometer setup is used for cross-section measurements of hadron knock-out and meson production. The KAOS spectrometer magnet of GSI is installed there in parallel to detect particles from (e,e'K)reactions under small forward angles. So the primary electron beam has to transit the spectrometer and after this it has to hit the existing beam dump. Because of the existing experimental setup, this must be realised by deflecting the beam before the target that is rotated to be in line with the KAOS spectrometer's inlet. This paper will deal with the basic concept of a flexible beam transport line (BTL) magnet chicane for different KAOS forward angles, while keeping the forward beam direction for the 3-spectrometer setup untouched. A survey concept for assembly and adjustment of the BTL will be introduced, that is also useful for future adjustments of the target mount after target change. Results of the BTL commissioning and a general MAMI status will be presented as well.

MOPZ038

EMMA Injection and Extraction

883

B.D. Muratori, J.K. Jones
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
Y. Giboudot
Brunel University, Middlesex, United Kingdom
D.J. Holder
The University of Liverpool, Liverpool, United Kingdom

EMMA (Electron Machine with Many Applications) is a prototype non-scaling electron FFAG hosted at Daresbury Laboratory. NS-FFAGs related to EMMA have an unprecedented potential for medical accelerators for carbon and proton hadron therapy. They could also be used as the accelerator for a sub-critical reactor. We summarize the design and commissioning of both the injection and extraction lines for this machine. In particular, we look at the commissioning challenges of injection and extraction.

MOPZ039

Dispersion-free Regions and Insertions for EMMA

886

B.D. Muratori, J.K. Jones
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

EMMA (Electron Machine with Many Applications) is a prototype non-scaling electron FFAG hosted at Daresbury Laboratory. Several upgrade possibilities for EMMA are explored, from creating a dispersion-free region in the ring to facilitate injection and extraction to making an insertion in EMMA by turning it into a racetrack-style machine. A dispersion-free region may be created in two separate ways. The first is by using a layout of EMMA which is naturally dispersion-free at the start and end of each cell. This means that we can arrange for periodic dispersion-free sections in every cell or in-between cells. The second is achieved through the use of sextupoles, by going off-axis in them, one has essentially a quadrupolar force which can be used to match the dispersion to zero in a particular place and for a particular energy. The benefits and drawbacks of both methods are discussed from the point of view of practicality and space in general, and applicability to EMMA in particular.