2011 Particle Accelerator Conference - List of Keywords (instrumentation)

Paper	Title	Other Keywords	Page
MOOBN5	Maximizing Technology Transfer Benefits to Society	ion, feedback, background, diagnostics	7
	A. Peters HIT, Heidelberg, Germany
	What is ‘technology transfer’? Is it just the movement of knowledge or is it a more interactive process? The speaker will present definitions of technology transfer and discuss the linked challenges. Furthermore some technology trans¬fer examples from industry will be given to derive step by step feasible strategies for successful collaboration. Problems like ‘different cultures’ in science institutes and industry will also be discussed as well as other key factors, e.g. the ability and willingness of scientists to move from public institutes to industry.
	Slides MOOBN5 [7.165 MB]

MOOBS4	Electron Cloud Experiments at Fermilab: Formation and Mitigation	electron, proton, vacuum, simulation	27
	R.M. Zwaska Fermilab, Batavia, USA
	We have performed a series at Fermilab to explore the Electron Cloud phenomenon. The Main Injector will have its beam intensity increased four-fold in the Project X upgrade, and would be subject to instabilities from the Electron Cloud. We present measurements of the Cloud formation in the Main Injector and experiments with materials for the mitigation of the Cloud. An experimental installation of Titanium-Nitride (TiN) coated beam pipes has been under study in the Main Injector since 2009; this material was directly compared to an adjacent stainless chamber through Electron Cloud measurement with Retarding Field Analyzers (RFAs). Over the long period of running we were able to observe the secondary electron yield (SEY) change and correlate it with electron fluence, establishing a conditioning history. Additionally, the installation has allowed measurement of the electron energy spectrum, comparison of instrumentation techniques, and energy-dependent behavior of the Electron Cloud. Finally, a new installation, developed in conjunction with Cornell and SLAC, will allow direct SEY measurement of material samples irradiated in the accelerator.
	Slides MOOBS4 [2.975 MB]

MOP032	High Pressure RF Cavity Test at Fermilab	cavity, pick-up, proton, solenoid	160
	B.T. Freemire, P.M. Hanlet, Y. Torun IIT, Chicago, Illinois, USA G. Flanagan, R.P. Johnson, M. Notani Muons, Inc, Batavia, USA M.R. Jana, A. Moretti, M. Popovic, A.V. Tollestrup, K. Yonehara Fermilab, Batavia, USA D.M. Kaplan Illinois Institute of Technology, Chicago, Illinois, USA
	Funding: Supported in part by DOE STTR grant DE-FG02-08ER86350 Operating a high gradient radio frequency cavity embedded in a strong magnetic field is an essential requirement for muon beam cooling. However, a magnetic field influences the maximum RF gradient due to focusing of dark current in the RF cavity. This problem is suppressed by filling the RF cavity with dense hydrogen gas. As the next step, we plan to explore the beam loading effect in the high pressure cavity by using a 400 MeV kinetic energy proton beam in the MuCool Test Area at Fermilab. We discuss the experimental setup and instrumentation.

MOP186	Low Energy Beam Diagnostics Developments within DITANET	storage-ring, ion, diagnostics, target	438
	C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom C.P. Welsch The University of Liverpool, Liverpool, United Kingdom
	Funding: Work supported by the EU under contract PITN-GA-2008-215080. Low energetic ion beam are very attractive for a large number of fundamental physics experiments. The development of beam instrumentation for such beams poses many challenges due to the very low currents down to only a few thousands of particles per second and the resulting very low signal levels. Within DITANET, several institutions aim at pushing low energy, low intensity diagnostics beyond the present state-of-the-art. This contribution gives examples from the progress across the DITANET network in this research area. On behalf of the DITANET consortium.

MOP196	A Modular Architecture for Accelerator Instrumentation	controls, feedback, target, low-level-rf	459
	J.H. DeLong BNL, Upton, Long Island, New York, USA
	Funding: US Department of Energy With accelerated schedules and finite resources the development of a common open source platform for accelerator instrumentation is required. This effort has led to the development of a flexible architecture with clearly defined interfaces. The resulting platform is currently used to implement fast orbit feedback as well as the Beam Position monitors for NSLS-II. The design includes an embedded processor, digital signal processing resources and communications interfaces to controls, the timing system and other devices distributed throughout the accelerator complex. This new architecture promotes customization and design re-use and is presented as an Open Source Hardware development project.

MOP202	Simulations of the LHC High Luminosity Monitors at Beam Energies 3.5 TeV to 7.0 TeV	luminosity, simulation, monitoring, interaction-region	471
	H.S. Matis, P. Humphreys, A. Ratti, W.C. Turner LBNL, Berkeley, California, USA R. Miyamoto BNL, Upton, Long Island, New York, USA J. Stiller Heidelberg University, Heidelberg, Germany
	Funding: This work partially supported by the US Department of Energy through the US LHC Accelerator Research Program (LARP). We have constructed two pairs of fast ionization chambers (BRAN) for measurement and optimization of luminosity at IR1 and IR5 of the LHC. These devices are capable of monitoring the performance of the LHC at low luminosity 10²⁸ cm^-2s⁻¹ during beam commissioning all the way up to the expected full luminosity of 10³⁴ cm^-2s⁻¹ at 7.0 TeV. The ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. To predict and improve the understanding of the BRAN performance, we created a detailed FLUKA model of the detector and its surroundings. In this paper, we describe the model and the results of our simulations including the detector’s estimated response to pp collisions at beam energies of 3.5, 5.0, and 7.0 TeV per beam. In addition, these simulations show the sensitivity of the BRAN to the crossing angle of the two LHC beams. It is shown that the BRAN sensitivity to crossing angle is proportional to the measurement of crossing angle by the LHC beam position monitors.

MOP224	A Data Acquisition System for Longitudinal Beam Properties in a Rapid Cycling Synchrotron	booster, emittance, acceleration, synchrotron	522
	J. Steimel, C.-Y. Tan Fermilab, Batavia, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. A longitudinal beam properties, data acquisition system has been commissioned to operate in the Fermilab booster ring. This system captures real time information including beam synchronous phase, bunch length, and coupled bunch instability amplitudes as the beam is accelerated from 400MeV to 8GeV in 33ms. The system uses an off-the-shelf Tektronix oscilloscope running Labview software and a synchronous pulse generator. This paper describes the hardware configuration and the software configuration used to optimize the data processing rate.

MOP234	Beam Position and Phase Monitors for the LANSCE Linac	linac, controls, neutron, monitoring	548
	R.C. McCrady, J.D. Gilpatrick, J.F. Power LANL, Los Alamos, New Mexico, USA
	Funding: This work is supported by the US Department of Energy under contract DE-AC52-06NA25396 New beam-position and phase monitors are under development for the linac at the Los Alamos Neutron Science Center. Transducers have been designed and are being fabricated. We are considering many options for the electronic instrumentation to process the signals and provide position and phase data with the necessary precision and flexibility to serve the various required functions. We’ll present the requirements of the system and the various options under consideration for instrumentation along with the advantages and shortcomings of these options.

TUP033	Engineering Design of Vertical Test Stand Cryostat	vacuum, cavity, shielding, radiation	874
	S.K. Suhane, S. Das, P.D. Gupta, S.C. Joshi, P.K. Kush, S. Raghvendra, N.K. Sharma RRCAT, Indore (M.P.), India R.H. Carcagno, C.M. Ginsburg, C.S. Mishra, J.P. Ozelis, R. Rabehl, C. Sylvester Fermilab, Batavia, USA V.C. Sahni Homi Bhbha National Institute (HBNI), DAE, Mumbai, India
	Under Indian Institutions and Fermilab collaboration Raja Ramanna Centre for Advanced Technology and Fermi Lab are jointly developing 2K Vertical Test Stand (VTS) cryostats for testing SCRF cavities. The VTS cryostat has been designed for a large testing aperture of 34 inches for testing of 325 MHz Spoke resonators, 650 MHz and 1.3 GHz multi-cell SCRF cavities for Project-X at FNAL and for VTS facility at RRCAT. VTS cryostat comprises of liquid helium (LHe) vessel with internal magnetic shield, top insert plate equipped with cavity support stand and radiation shield, liquid nitrogen (LN2) shield and vacuum vessel with external magnetic shield. . The engineering design and analysis of VTS cryostat has been carried out using ASME B&PV code and FEA. Design of internal and external magnetic shields was performed to limit the magnetic field inside LHe vessel, at the cavity surface <10 mG. Thermal analysis for LN2 shield has been performed to check the effectiveness of LN2 cooling.

TUP041	Quench Dynamics in SRF Cavities: Can We Locate the Quench Origin with 2nd Sound?	cavity, SRF, radio-frequency, simulation	883
	Y.B. Maximenko MIPT, Dolgoprudniy, Moscow Region, Russia D.A. Sergatskov Fermilab, Batavia, USA
	A newly developed method of locating quench in SRF cavities by detecting second-sound waves has been gaining popularity in SRF laboratories. The technique is based on measurements of time delays between the quench, as determined by the RF system, and arrival of the 2nd sound wave to the multiple detectors placed around the cavity in superfluid helium. Unlike multi-channel temperature mapping, this approach requires only few sensors and simple readout electronics; it can be used with SRF cavities of almost arbitrary shape. One of its drawbacks is that being an indirect method it requires one to solve an inverse problem to find a location of a quench. We tried to solve this inverse problem by using a parametric forward model. By analyzing the data we found that a simple model where 2nd-sound emitter is a near-singular source does not describe the physical system well enough. A time-dependent analysis of a quench process can help us to put forward a more adequate model. We present here our current algorithm to solve the inverse problem and discuss the experimental results.

TUP165	Design, Construction and Test of Cryogen-Free HTS Coil Structure	vacuum, quadrupole, superconducting-magnet, radiation	1133
	H.M. Hocker, M. Anerella, R.C. Gupta, S.R. Plate, W. Sampson, J. Schmalzle, Y. Shiroyanagi BNL, Upton, Long Island, New York, USA
	Funding: Work supported by the U.S. Dept. of Energy under Contract No. DE-AC02-98CH10886 & under Coop. Agreement DE-SC0000661 from DOE-SC that provides financial assistance to MSU to design and establish FRIB This paper will describe design, construction and test results of a cryo-mechanical structure to study coils made with the second generation High Temperature Superconductor (HTS) for the Facility for Rare Isotope Beams (FRIB). A magnet comprised of HTS coils mounted in a vacuum vessel and conduction-cooled with Gifford-McMahon cycle cryocoolers is used to develop and refine design and construction techniques. The study of these techniques and their effect on operations provides a better understanding of the use of cryogen free magnets in future accelerator projects. A cryogen-free, superconducting HTS magnet possesses certain operational advantages over cryogenically cooled, low temperature superconducting magnets.

Paper

Title

Other Keywords

Page

MOOBN5

Maximizing Technology Transfer Benefits to Society

ion, feedback, background, diagnostics

7

A. Peters
HIT, Heidelberg, Germany

What is ‘technology transfer’? Is it just the movement of knowledge or is it a more interactive process? The speaker will present definitions of technology transfer and discuss the linked challenges. Furthermore some technology trans¬fer examples from industry will be given to derive step by step feasible strategies for successful collaboration. Problems like ‘different cultures’ in science institutes and industry will also be discussed as well as other key factors, e.g. the ability and willingness of scientists to move from public institutes to industry.

Slides MOOBN5 [7.165 MB]

MOOBS4

Electron Cloud Experiments at Fermilab: Formation and Mitigation

electron, proton, vacuum, simulation

27

R.M. Zwaska
Fermilab, Batavia, USA

We have performed a series at Fermilab to explore the Electron Cloud phenomenon. The Main Injector will have its beam intensity increased four-fold in the Project X upgrade, and would be subject to instabilities from the Electron Cloud. We present measurements of the Cloud formation in the Main Injector and experiments with materials for the mitigation of the Cloud. An experimental installation of Titanium-Nitride (TiN) coated beam pipes has been under study in the Main Injector since 2009; this material was directly compared to an adjacent stainless chamber through Electron Cloud measurement with Retarding Field Analyzers (RFAs). Over the long period of running we were able to observe the secondary electron yield (SEY) change and correlate it with electron fluence, establishing a conditioning history. Additionally, the installation has allowed measurement of the electron energy spectrum, comparison of instrumentation techniques, and energy-dependent behavior of the Electron Cloud. Finally, a new installation, developed in conjunction with Cornell and SLAC, will allow direct SEY measurement of material samples irradiated in the accelerator.

Slides MOOBS4 [2.975 MB]

MOP032

High Pressure RF Cavity Test at Fermilab

cavity, pick-up, proton, solenoid

160

B.T. Freemire, P.M. Hanlet, Y. Torun
IIT, Chicago, Illinois, USA
G. Flanagan, R.P. Johnson, M. Notani
Muons, Inc, Batavia, USA
M.R. Jana, A. Moretti, M. Popovic, A.V. Tollestrup, K. Yonehara
Fermilab, Batavia, USA
D.M. Kaplan
Illinois Institute of Technology, Chicago, Illinois, USA

Funding: Supported in part by DOE STTR grant DE-FG02-08ER86350
Operating a high gradient radio frequency cavity embedded in a strong magnetic field is an essential requirement for muon beam cooling. However, a magnetic field influences the maximum RF gradient due to focusing of dark current in the RF cavity. This problem is suppressed by filling the RF cavity with dense hydrogen gas. As the next step, we plan to explore the beam loading effect in the high pressure cavity by using a 400 MeV kinetic energy proton beam in the MuCool Test Area at Fermilab. We discuss the experimental setup and instrumentation.

MOP186

Low Energy Beam Diagnostics Developments within DITANET

storage-ring, ion, diagnostics, target

438

C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom

Funding: Work supported by the EU under contract PITN-GA-2008-215080.
Low energetic ion beam are very attractive for a large number of fundamental physics experiments. The development of beam instrumentation for such beams poses many challenges due to the very low currents down to only a few thousands of particles per second and the resulting very low signal levels. Within DITANET, several institutions aim at pushing low energy, low intensity diagnostics beyond the present state-of-the-art. This contribution gives examples from the progress across the DITANET network in this research area.
On behalf of the DITANET consortium.

MOP196

A Modular Architecture for Accelerator Instrumentation

controls, feedback, target, low-level-rf

459

J.H. DeLong
BNL, Upton, Long Island, New York, USA

Funding: US Department of Energy
With accelerated schedules and finite resources the development of a common open source platform for accelerator instrumentation is required. This effort has led to the development of a flexible architecture with clearly defined interfaces. The resulting platform is currently used to implement fast orbit feedback as well as the Beam Position monitors for NSLS-II. The design includes an embedded processor, digital signal processing resources and communications interfaces to controls, the timing system and other devices distributed throughout the accelerator complex. This new architecture promotes customization and design re-use and is presented as an Open Source Hardware development project.

MOP202

Simulations of the LHC High Luminosity Monitors at Beam Energies 3.5 TeV to 7.0 TeV

luminosity, simulation, monitoring, interaction-region

471

H.S. Matis, P. Humphreys, A. Ratti, W.C. Turner
LBNL, Berkeley, California, USA
R. Miyamoto
BNL, Upton, Long Island, New York, USA
J. Stiller
Heidelberg University, Heidelberg, Germany

Funding: This work partially supported by the US Department of Energy through the US LHC Accelerator Research Program (LARP).
We have constructed two pairs of fast ionization chambers (BRAN) for measurement and optimization of luminosity at IR1 and IR5 of the LHC. These devices are capable of monitoring the performance of the LHC at low luminosity 10²⁸ cm^-2s⁻¹ during beam commissioning all the way up to the expected full luminosity of 10³⁴ cm^-2s⁻¹ at 7.0 TeV. The ionization chambers measure the intensity of hadronic/electromagnetic showers produced by the forward neutral particles of LHC collisions. To predict and improve the understanding of the BRAN performance, we created a detailed FLUKA model of the detector and its surroundings. In this paper, we describe the model and the results of our simulations including the detector’s estimated response to pp collisions at beam energies of 3.5, 5.0, and 7.0 TeV per beam. In addition, these simulations show the sensitivity of the BRAN to the crossing angle of the two LHC beams. It is shown that the BRAN sensitivity to crossing angle is proportional to the measurement of crossing angle by the LHC beam position monitors.

MOP224

A Data Acquisition System for Longitudinal Beam Properties in a Rapid Cycling Synchrotron

booster, emittance, acceleration, synchrotron

522

J. Steimel, C.-Y. Tan
Fermilab, Batavia, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
A longitudinal beam properties, data acquisition system has been commissioned to operate in the Fermilab booster ring. This system captures real time information including beam synchronous phase, bunch length, and coupled bunch instability amplitudes as the beam is accelerated from 400MeV to 8GeV in 33ms. The system uses an off-the-shelf Tektronix oscilloscope running Labview software and a synchronous pulse generator. This paper describes the hardware configuration and the software configuration used to optimize the data processing rate.

MOP234

Beam Position and Phase Monitors for the LANSCE Linac

linac, controls, neutron, monitoring

548

R.C. McCrady, J.D. Gilpatrick, J.F. Power
LANL, Los Alamos, New Mexico, USA

Funding: This work is supported by the US Department of Energy under contract DE-AC52-06NA25396
New beam-position and phase monitors are under development for the linac at the Los Alamos Neutron Science Center. Transducers have been designed and are being fabricated. We are considering many options for the electronic instrumentation to process the signals and provide position and phase data with the necessary precision and flexibility to serve the various required functions. We’ll present the requirements of the system and the various options under consideration for instrumentation along with the advantages and shortcomings of these options.

TUP033

Engineering Design of Vertical Test Stand Cryostat

vacuum, cavity, shielding, radiation

874

S.K. Suhane, S. Das, P.D. Gupta, S.C. Joshi, P.K. Kush, S. Raghvendra, N.K. Sharma
RRCAT, Indore (M.P.), India
R.H. Carcagno, C.M. Ginsburg, C.S. Mishra, J.P. Ozelis, R. Rabehl, C. Sylvester
Fermilab, Batavia, USA
V.C. Sahni
Homi Bhbha National Institute (HBNI), DAE, Mumbai, India

Under Indian Institutions and Fermilab collaboration Raja Ramanna Centre for Advanced Technology and Fermi Lab are jointly developing 2K Vertical Test Stand (VTS) cryostats for testing SCRF cavities. The VTS cryostat has been designed for a large testing aperture of 34 inches for testing of 325 MHz Spoke resonators, 650 MHz and 1.3 GHz multi-cell SCRF cavities for Project-X at FNAL and for VTS facility at RRCAT. VTS cryostat comprises of liquid helium (LHe) vessel with internal magnetic shield, top insert plate equipped with cavity support stand and radiation shield, liquid nitrogen (LN2) shield and vacuum vessel with external magnetic shield. . The engineering design and analysis of VTS cryostat has been carried out using ASME B&PV code and FEA. Design of internal and external magnetic shields was performed to limit the magnetic field inside LHe vessel, at the cavity surface <10 mG. Thermal analysis for LN2 shield has been performed to check the effectiveness of LN2 cooling.

TUP041

Quench Dynamics in SRF Cavities: Can We Locate the Quench Origin with 2nd Sound?

cavity, SRF, radio-frequency, simulation

883

Y.B. Maximenko
MIPT, Dolgoprudniy, Moscow Region, Russia
D.A. Sergatskov
Fermilab, Batavia, USA

A newly developed method of locating quench in SRF cavities by detecting second-sound waves has been gaining popularity in SRF laboratories. The technique is based on measurements of time delays between the quench, as determined by the RF system, and arrival of the 2nd sound wave to the multiple detectors placed around the cavity in superfluid helium. Unlike multi-channel temperature mapping, this approach requires only few sensors and simple readout electronics; it can be used with SRF cavities of almost arbitrary shape. One of its drawbacks is that being an indirect method it requires one to solve an inverse problem to find a location of a quench. We tried to solve this inverse problem by using a parametric forward model. By analyzing the data we found that a simple model where 2nd-sound emitter is a near-singular source does not describe the physical system well enough. A time-dependent analysis of a quench process can help us to put forward a more adequate model. We present here our current algorithm to solve the inverse problem and discuss the experimental results.

TUP165

Design, Construction and Test of Cryogen-Free HTS Coil Structure

vacuum, quadrupole, superconducting-magnet, radiation

1133

H.M. Hocker, M. Anerella, R.C. Gupta, S.R. Plate, W. Sampson, J. Schmalzle, Y. Shiroyanagi
BNL, Upton, Long Island, New York, USA

Funding: Work supported by the U.S. Dept. of Energy under Contract No. DE-AC02-98CH10886 & under Coop. Agreement DE-SC0000661 from DOE-SC that provides financial assistance to MSU to design and establish FRIB
This paper will describe design, construction and test results of a cryo-mechanical structure to study coils made with the second generation High Temperature Superconductor (HTS) for the Facility for Rare Isotope Beams (FRIB). A magnet comprised of HTS coils mounted in a vacuum vessel and conduction-cooled with Gifford-McMahon cycle cryocoolers is used to develop and refine design and construction techniques. The study of these techniques and their effect on operations provides a better understanding of the use of cryogen free magnets in future accelerator projects. A cryogen-free, superconducting HTS magnet possesses certain operational advantages over cryogenically cooled, low temperature superconducting magnets.