ICALEPCS2013 - List of Authors (Jensen, L.K.)

Paper

Title

Page

Personnel Protection of the CERN SPS North Hall in Fixed Target Primary Ion Mode

66

T. Hakulinen, J. Axensalva, F. Havart, S.C. Hutchins, L.K. Jensen, D. Manglunki, P. Ninin, P. Odier, S.B. Reignier, J.P. Ridewood, L. Søby, C. Theis, F. Valentini, D. Vaxelaire, H. Vincke
CERN, Geneva, Switzerland

While CERN's Super Proton Synchrotron (SPS) is able to deliver both secondary proton and primary ion beams to fixed targets in the North Area, the experimental areas (North Hall) are widely accessible during beam. In ion mode all normal safety elements involved in producing secondary beams are removed, so that an accidental extraction of a high-intensity proton beam into the North Hall would expose personnel present there to a radiation hazard. This has required an injector reconfiguration restricting operation to either ions or protons. However, demands for operational flexibility of CERN accelerators have led to a need to mix within the same SPS super-cycle both high-intensity proton cycles for LHC or HiRadMat and ion cycles for the North Area. We present an active interlock designed to mitigate this hazard: Beam Current Transformers are used to measure the level of beam intensity, and if above a set threshold, pulsing of the extraction septa is vetoed. The safety function is implemented by means of two logically equivalent but diverse and separate interlock chains. This interlock is expected to be in place once the SPS resumes operation after the first Long Shutdown in 2014.

Slides MOMIB06 [0.236 MB]

Poster MOMIB06 [4.250 MB]

MOPPC111

Overview of LINAC4 Beam Instrumentation Software

374

L.K. Jensen, M. Andersen, A. Guerrero, B. Kolad, M. Ludwig, U. Raich, F. Roncarolo
CERN, Geneva, Switzerland

This paper presents an overview of results from the recent LINAC4 commissioning with H⁻ beam at CERN. It will cover beam instrumentation systems acquiring beam position, intensity, size and emittance starting from the project proposal to commissioning results.

THPPC119

Software Architecture for the LHC Beam-based Feedback System at CERN

1337

L.K. Jensen, M. Andersen, K. Fuchsberger, S. Jackson, L. Ponce, R.J. Steinhagen, J. Wenninger
CERN, Geneva, Switzerland

This paper presents an overview of beam based feedback systems at the LHC at CERN. It will cover the system architecture which is split into two main parts – a controller (OFC) and a service unit (OFSU). The paper presents issues encountered during beam commissioning and lessons learned including follow-up from a recent review which took place at CERN

Poster THPPC119 [1.474 MB]

Paper	Title	Page
MOMIB06	Personnel Protection of the CERN SPS North Hall in Fixed Target Primary Ion Mode	66
	T. Hakulinen, J. Axensalva, F. Havart, S.C. Hutchins, L.K. Jensen, D. Manglunki, P. Ninin, P. Odier, S.B. Reignier, J.P. Ridewood, L. Søby, C. Theis, F. Valentini, D. Vaxelaire, H. Vincke CERN, Geneva, Switzerland
	While CERN's Super Proton Synchrotron (SPS) is able to deliver both secondary proton and primary ion beams to fixed targets in the North Area, the experimental areas (North Hall) are widely accessible during beam. In ion mode all normal safety elements involved in producing secondary beams are removed, so that an accidental extraction of a high-intensity proton beam into the North Hall would expose personnel present there to a radiation hazard. This has required an injector reconfiguration restricting operation to either ions or protons. However, demands for operational flexibility of CERN accelerators have led to a need to mix within the same SPS super-cycle both high-intensity proton cycles for LHC or HiRadMat and ion cycles for the North Area. We present an active interlock designed to mitigate this hazard: Beam Current Transformers are used to measure the level of beam intensity, and if above a set threshold, pulsing of the extraction septa is vetoed. The safety function is implemented by means of two logically equivalent but diverse and separate interlock chains. This interlock is expected to be in place once the SPS resumes operation after the first Long Shutdown in 2014.
	Slides MOMIB06 [0.236 MB]
	Poster MOMIB06 [4.250 MB]

MOPPC111	Overview of LINAC4 Beam Instrumentation Software	374
	L.K. Jensen, M. Andersen, A. Guerrero, B. Kolad, M. Ludwig, U. Raich, F. Roncarolo CERN, Geneva, Switzerland
	This paper presents an overview of results from the recent LINAC4 commissioning with H⁻ beam at CERN. It will cover beam instrumentation systems acquiring beam position, intensity, size and emittance starting from the project proposal to commissioning results.

THPPC119	Software Architecture for the LHC Beam-based Feedback System at CERN	1337
	L.K. Jensen, M. Andersen, K. Fuchsberger, S. Jackson, L. Ponce, R.J. Steinhagen, J. Wenninger CERN, Geneva, Switzerland
	This paper presents an overview of beam based feedback systems at the LHC at CERN. It will cover the system architecture which is split into two main parts – a controller (OFC) and a service unit (OFSU). The paper presents issues encountered during beam commissioning and lessons learned including follow-up from a recent review which took place at CERN
	Poster THPPC119 [1.474 MB]