IPAC2012 - List of Authors (Møller, S.P.)

Paper	Title	Page
MOPPD049	The Layout of the High Energy Beam Transport for the European Spallation Source	475
	A.I.S. Holm, S.P. Møller, H.D. Thomsen ISA, Aarhus, Denmark
	The status of the High Energy Beam Transport (HEBT) line for the European Spallation Source (ESS) is presented. The HEBT brings the beam from the underground linac to the target at surface level. The main design objectives of the HEBT, such as space for upgrades, producing the desired target footprint etc. are discussed and the preferred design is shown. Large amplitude particles, a halo, are formed in the last part of the linac. Hence, every given value of the peak current density at the target is correlated with a certain power deposited outside the beam footprint. This correlation is studied and optimized. Furthermore, first studies of the vertical stability of the beam footprint and profile on target due to misalignment or mismatch of the incoming beam are made.

MOPPD072	A High Energy Collimation System for the European Spallation Source	529
	H.D. Thomsen, A.I.S. Holm, S.P. Møller ISA, Aarhus, Denmark
	At the European Spallation Source (ESS), a ~160 m high energy beam transport (HEBT) system is to guide the high-power (5 MW) proton beam from a superconducting 2.5 GeV linac to a spallation target station. The HEBT could include a single-pass collimation system to protect all downstream accelerator components, including the vital target. The system would be built to withstand both continuous low-power losses (i.e. introduce halo reduction) and infrequent short-term, high-power beam exposure, essentially a fault scenario. Although a collimation system could reduce the uncontrolled beam losses and thus activation levels elsewhere, it takes up precious longitudinal space intended for future beam power upgrades and sets demands for the beam optics, as will be discussed. Possible materials and specifications will also be described.

TUPPP003	Status and Very First Commissioning of the ASTRID2 Synchrotron Light Source	1605
	S.P. Møller, N. Hertel, J.S. Nielsen ISA, Aarhus, Denmark
	ASTRID2 is the new 10 nm UV and soft x-ray light source currently being built at Aarhus University, to replace the ageing source ASTRID. ASTRID2 is now in the end of its installation phase, with commissioning expected to take place during the spring. The status of the installation together with the first results of the commissioning will be presented.

THPPP085	End to End Beam Dynamics of the ESS Linac	3933
	M. Eshraqi, H. Danared, A. Ponton ESS, Lund, Sweden I. Bustinduy ESS Bilbao, Bilbao, Spain L. Celona INFN/LNS, Catania, Italy M. Comunian INFN/LNL, Legnaro (PD), Italy A.I.S. Holm, S.P. Møller, H.D. Thomsen ISA, Aarhus, Denmark J. Stovall CERN, Geneva, Switzerland
	The European Spallation Source, ESS, uses a linear accelerator to deliver a high intensity proton beam to the target station. The nominal beam power on target will be 5~MW at an energy of 2.5~GeV. We briefly describe the individual accelerating structures and transport lines through which we have carried out multiparticle beam dynamics simulations. We will present a review of the beam dynamics from the source to the target.

Paper

Title

Page

The Layout of the High Energy Beam Transport for the European Spallation Source

475

A.I.S. Holm, S.P. Møller, H.D. Thomsen
ISA, Aarhus, Denmark

The status of the High Energy Beam Transport (HEBT) line for the European Spallation Source (ESS) is presented. The HEBT brings the beam from the underground linac to the target at surface level. The main design objectives of the HEBT, such as space for upgrades, producing the desired target footprint etc. are discussed and the preferred design is shown. Large amplitude particles, a halo, are formed in the last part of the linac. Hence, every given value of the peak current density at the target is correlated with a certain power deposited outside the beam footprint. This correlation is studied and optimized. Furthermore, first studies of the vertical stability of the beam footprint and profile on target due to misalignment or mismatch of the incoming beam are made.

MOPPD072

A High Energy Collimation System for the European Spallation Source

529

H.D. Thomsen, A.I.S. Holm, S.P. Møller
ISA, Aarhus, Denmark

At the European Spallation Source (ESS), a ~160 m high energy beam transport (HEBT) system is to guide the high-power (5 MW) proton beam from a superconducting 2.5 GeV linac to a spallation target station. The HEBT could include a single-pass collimation system to protect all downstream accelerator components, including the vital target. The system would be built to withstand both continuous low-power losses (i.e. introduce halo reduction) and infrequent short-term, high-power beam exposure, essentially a fault scenario. Although a collimation system could reduce the uncontrolled beam losses and thus activation levels elsewhere, it takes up precious longitudinal space intended for future beam power upgrades and sets demands for the beam optics, as will be discussed. Possible materials and specifications will also be described.

TUPPP003

Status and Very First Commissioning of the ASTRID2 Synchrotron Light Source

1605

S.P. Møller, N. Hertel, J.S. Nielsen
ISA, Aarhus, Denmark

ASTRID2 is the new 10 nm UV and soft x-ray light source currently being built at Aarhus University, to replace the ageing source ASTRID. ASTRID2 is now in the end of its installation phase, with commissioning expected to take place during the spring. The status of the installation together with the first results of the commissioning will be presented.

THPPP085

End to End Beam Dynamics of the ESS Linac

3933

M. Eshraqi, H. Danared, A. Ponton
ESS, Lund, Sweden
I. Bustinduy
ESS Bilbao, Bilbao, Spain
L. Celona
INFN/LNS, Catania, Italy
M. Comunian
INFN/LNL, Legnaro (PD), Italy
A.I.S. Holm, S.P. Møller, H.D. Thomsen
ISA, Aarhus, Denmark
J. Stovall
CERN, Geneva, Switzerland

The European Spallation Source, ESS, uses a linear accelerator to deliver a high intensity proton beam to the target station. The nominal beam power on target will be 5~MW at an energy of 2.5~GeV. We briefly describe the individual accelerating structures and transport lines through which we have carried out multiparticle beam dynamics simulations. We will present a review of the beam dynamics from the source to the target.