IPAC2011 - List of Authors (Jansson, A.)

Paper	Title	Page
TUPC131	Overview of ESS Beam Loss Monitoring System	1329
	L. Tchelidze, A. Jansson ESS, Lund, Sweden
	European Spallation Source (ESS) is a multi-MW proton linear accelerator that will be built in Lund, Sweden. Due to the high power of the machine, losses need to be minimized to avoid damaging the accelerator components and quenching superconducting magnets. Loss monitors have to be positioned all across the accelerator, so that they form a reliable protection system. A careful analysis of the loss nature for ESS is in progress to determine the locations for the loss detectors. This paper presents preliminary results of the simulations for the detector response functions, which are calculated for several different energies and incident angles of protons, at certain parts of the accelerator. A simple, baseline geometry configuration is used in the calculations. This paper also gives an overview of the considered ESS beam loss monitoring system. It describes the types of the detectors which are planned to be used at ESS, and discusses the number of detectors needed along different parts of the machine. As planned, a primary tool for measuring losses at ESS will be ionization chambers, the conceptual design of which is given in this paper based on the response time considerations.

WEPS059	Layout of the ESS Linac	2631
	H. Danared, M. Eshraqi, W. Hees, A. Jansson, M. Lindroos, S. Peggs, A. Ponton ESS, Lund, Sweden
	The European Spallation Source will use a 2.5 GeV, 50 mA pulsed proton linac to produce an average 5 MW of power on the spallation target. It will consist of normal-conducting part accelerating particles to 50 MeV in an RFQ and a drift-tube linac and a superconducting part with spoke resonators and two families of elliptical cavities. A high-energy beam transport takes the particles through an upgrade section and at least one bend and demagnifies the beam on to the target. The paper will present the current layout of the linac and discuss parameters that define its length from source to target.

WEPS062	Design and Beam Dynamics Study of Hybrid ESS LINAC	2640
	M. Eshraqi, H. Danared, W. Hees, A. Jansson ESS, Lund, Sweden
	The European Spallation Source, {\sc ESS}, will use a superconducting linear accelerator delivering high current long pulses with an average beam power of 5~MW to the target station at 2.5~GeV. A new cryomodule architecture is proposed which allows for a transition between cryomodules in the sub-100~K region, this region can work even at room temperature. This new hybrid design will generate a lower heat load with respect to a fully segmented design - while still providing easy access to individual cryomodules for maintenance and repair. This paper will present a review of the {\sc linac} design, beam dynamics studies and a preliminary cryogenic analysis of the transition region.

Paper

Title

Page

Overview of ESS Beam Loss Monitoring System

1329

L. Tchelidze, A. Jansson
ESS, Lund, Sweden

European Spallation Source (ESS) is a multi-MW proton linear accelerator that will be built in Lund, Sweden. Due to the high power of the machine, losses need to be minimized to avoid damaging the accelerator components and quenching superconducting magnets. Loss monitors have to be positioned all across the accelerator, so that they form a reliable protection system. A careful analysis of the loss nature for ESS is in progress to determine the locations for the loss detectors. This paper presents preliminary results of the simulations for the detector response functions, which are calculated for several different energies and incident angles of protons, at certain parts of the accelerator. A simple, baseline geometry configuration is used in the calculations. This paper also gives an overview of the considered ESS beam loss monitoring system. It describes the types of the detectors which are planned to be used at ESS, and discusses the number of detectors needed along different parts of the machine. As planned, a primary tool for measuring losses at ESS will be ionization chambers, the conceptual design of which is given in this paper based on the response time considerations.

WEPS059

Layout of the ESS Linac

2631

H. Danared, M. Eshraqi, W. Hees, A. Jansson, M. Lindroos, S. Peggs, A. Ponton
ESS, Lund, Sweden

The European Spallation Source will use a 2.5 GeV, 50 mA pulsed proton linac to produce an average 5 MW of power on the spallation target. It will consist of normal-conducting part accelerating particles to 50 MeV in an RFQ and a drift-tube linac and a superconducting part with spoke resonators and two families of elliptical cavities. A high-energy beam transport takes the particles through an upgrade section and at least one bend and demagnifies the beam on to the target. The paper will present the current layout of the linac and discuss parameters that define its length from source to target.

WEPS062

Design and Beam Dynamics Study of Hybrid ESS LINAC

2640

M. Eshraqi, H. Danared, W. Hees, A. Jansson
ESS, Lund, Sweden

The European Spallation Source, {\sc ESS}, will use a superconducting linear accelerator delivering high current long pulses with an average beam power of 5~MW to the target station at 2.5~GeV. A new cryomodule architecture is proposed which allows for a transition between cryomodules in the sub-100~K region, this region can work even at room temperature. This new hybrid design will generate a lower heat load with respect to a fully segmented design - while still providing easy access to individual cryomodules for maintenance and repair. This paper will present a review of the {\sc linac} design, beam dynamics studies and a preliminary cryogenic analysis of the transition region.