Cyclotrons2013 - List of Keywords (diagnostics)

Paper	Title	Other Keywords	Page
MO1PB03	Current Status of the Superconducting Cyclotron Project at Kolkata	cyclotron, extraction, target, resonance	11
	J. Debnath, A. Chakrabarti, M.K. Dey VECC, Kolkata, India
	The commissioning of Kolkata superconducting cyclotron with internal ion beam had been reported in the last cyclotron conference. At that time, there was gradual beam loss due to poor vacuum. After installing a higher capacity liquid helium plant the cryo-panels were made functional leading to a substantial increase in the beam intensity. It was hoped that higher beam intensity would help in extraction of a measurable fraction of the beam, but that did not happen. Detailed investigation of beam behavior with the help of three beam probes, installed temporarily at three sectors, revealed that the beam goes highly off-centered while passing through the resonance zone. A plastic scintillator based phase probe was mounted on the radial probe and beam phase was measured accurately. It was quite clear that large amount of field imperfection was prohibiting the beam to be extracted. So magnetic field measurement has been started again and considerable amount of harmonic and average field errors have been found. In this paper we report the important developments since 2010.
	Slides MO1PB03 [13.028 MB]

MOPPT016	Configurable 1 MeV Test Stand Cyclotron for High Intensity Injection System Development	injection, cyclotron, ion-source, ion	67
	F.S. Labrecque, F.S. Grillet, B.F. Milton, L. AC. Piazza, W. Stazyk, S.L. Tarrant BCSI, Vancouver, BC, Canada J.R. Alonso, D. Campo MIT, Cambridge, Massachusetts, USA L. Calabretta INFN/LNS, Catania, Italy M.M. Maggiore INFN/LNL, Legnaro (PD), Italy
	In order to study and optimize the ion source and injection system of our multiple cyclotron products, Best® Cyclotron Systems Inc. (BCSI) has assembled in its Vancouver office a 1 MeV cyclotron development platform. To accommodate different injection line configurations, the main magnet median plane is vertically oriented and rail mounted which also allows easy access to the inner components. In addition, the main magnet central region is equipped with interchangeable magnetic poles, RF elements, and inflector electrodes in order to replicate the features of the simulated cyclotrons. Multiple diagnostic devices are available to fully characterize the beam along the injection line and inside the cyclotron. This paper will describe the design of two system configurations: the 60 MeV H²⁺ for the DAEΔALUS experiment (MIT, BEST, INFN-LNS) and the BCSI 70 MeV H⁻ cyclotron.

MOPPT032	Status Report and New Developments at iThemba LABS	cyclotron, ion, controls, ion-source	94
	J.L. Conradie, L.S. Anthony, R.A. Bark, J.C. Cornell, J.G. De Villiers, H. Du Plessis, J.S. Du Toit, W. Duckitt, D.T. Fourie, M.E. Hogan, I.H. Kohler, C. Lussi, R.H. McAlister, H.W. Mostert, J.V. Pilcher, P.F. Rohwer, M. Sakildien, N. Stodart, R.W. Thomae, M.J. Van Niekerk, P.A. van Schalkwyk iThemba LABS, Somerset West, South Africa
	iThemba LABS is a multidisciplinary research facility in the fields of nuclear physics research, neutron therapy, proton therapy and radionuclide production. Three long running projects, the construction of a new ECR ion source, a beam phase measuring system for the separated-sector cyclotron comprising 21 fixed probes and an RF amplitude and phase monitoring system for the 16 RF systems have been completed. The first results will be reported. The status of the newly developed low-level RF control system will be discussed and an interactive magnetic field calculation method for an injector cyclotron, making use of a data base developed from calculations with the computer program TOSCA, will be presented. Plans to save on the power consumption of the accelerators will be reported on. The beam statistics and the progress with the planning of a radioactive ion beam facility will be discussed.

TUPPT008	A Profile Analysis Method for High-Intensity DC Beams Using a Thermographic Camera	target, neutron, background, beam-transport	168
	K. Katagiri, S. Hojo, T. Honma, A. Noda, K. Noda NIRS, Chiba-shi, Japan
	A new analysis method for the digital-image processing apparatus has been developed to evaluate profiles of high-intensity DC beams from temperature images of irradiated-thin foils. Numerical calculations were performed to examine the reliability and the performance of the profile analysis method. To simulate the temperature images acquired by a thermographic camera, temperature distributions were numerically calculated for various beam parameters. The noises in the temperature images, which are added by the camera sensor, were also simulated to be taken its effect into account. By using the profile analysis method, the beam profiles were evaluated from the simulated-temperature images, and they were compared with the exact solution of the beam profiles. We found that the profile analysis method is adaptable over a wide beam current range of ~0.1 – 10 μA, even if a general-purpose thermographic camera with rather high noise (NETD ~ 0.3 K, NETD: Noise Equivalent Temperature Difference) is employed.

TUPPT010	Variants of Grounding and Shielding in a Beam Diagnostics Measurement of Low Signal Currents	coupling, shielding, high-voltage, impedance	174
	R. Dölling PSI, Villigen PSI, Switzerland
	The performance of several variants of grounding and shielding of long measurements cables for small currents against ground potential differences has been estimated analytically.

TU3PB02	Development of a Scintillator Probe Based on Fiber Optics for Radial Beam Diagnostics of the Ion Beam of the 88-Inch Cyclotron	cyclotron, ion, extraction, controls	262
	M.M. Strohmeier, J.Y. Benitez, M.K. Covo, C.M. Lyneis, B. Ninemire, L. Phair, P. Pipersky, D.S. Todd LBNL, Berkeley, California, USA K.Y. Franzen Mevion, Littleton, Massachusetts, USA
	Operators at the 88-Inch Cyclotron have many tuning parameters to optimize transmission from injection through extraction. However, the only diagnostics they have had were a Faraday Cup at the exit of the machine and a so called "Dee-Probe" which gives a current-vs-radius (IvR) measurement. Motivated by low transmission of the Cyclotron and to address how tuning can affect the beam, we have developed an optical beam viewer whose radial position within the cyclotron can be adjusted remotely. This viewer allows us to image the beam cross section and its axial position with very high spatial resolution as a function of radius. In this paper, we describe the mechanical development of the device which consists of a Kbr scintillator crystal, a fiber bundle and a digital camera and we present data from its initial commissioning.
	Slides TU3PB02 [4.936 MB]

Paper

Title

Other Keywords

Page

MO1PB03

Current Status of the Superconducting Cyclotron Project at Kolkata

cyclotron, extraction, target, resonance

11

J. Debnath, A. Chakrabarti, M.K. Dey
VECC, Kolkata, India

The commissioning of Kolkata superconducting cyclotron with internal ion beam had been reported in the last cyclotron conference. At that time, there was gradual beam loss due to poor vacuum. After installing a higher capacity liquid helium plant the cryo-panels were made functional leading to a substantial increase in the beam intensity. It was hoped that higher beam intensity would help in extraction of a measurable fraction of the beam, but that did not happen. Detailed investigation of beam behavior with the help of three beam probes, installed temporarily at three sectors, revealed that the beam goes highly off-centered while passing through the resonance zone. A plastic scintillator based phase probe was mounted on the radial probe and beam phase was measured accurately. It was quite clear that large amount of field imperfection was prohibiting the beam to be extracted. So magnetic field measurement has been started again and considerable amount of harmonic and average field errors have been found. In this paper we report the important developments since 2010.

Slides MO1PB03 [13.028 MB]

MOPPT016

Configurable 1 MeV Test Stand Cyclotron for High Intensity Injection System Development

injection, cyclotron, ion-source, ion

67

F.S. Labrecque, F.S. Grillet, B.F. Milton, L. AC. Piazza, W. Stazyk, S.L. Tarrant
BCSI, Vancouver, BC, Canada
J.R. Alonso, D. Campo
MIT, Cambridge, Massachusetts, USA
L. Calabretta
INFN/LNS, Catania, Italy
M.M. Maggiore
INFN/LNL, Legnaro (PD), Italy

In order to study and optimize the ion source and injection system of our multiple cyclotron products, Best® Cyclotron Systems Inc. (BCSI) has assembled in its Vancouver office a 1 MeV cyclotron development platform. To accommodate different injection line configurations, the main magnet median plane is vertically oriented and rail mounted which also allows easy access to the inner components. In addition, the main magnet central region is equipped with interchangeable magnetic poles, RF elements, and inflector electrodes in order to replicate the features of the simulated cyclotrons. Multiple diagnostic devices are available to fully characterize the beam along the injection line and inside the cyclotron. This paper will describe the design of two system configurations: the 60 MeV H²⁺ for the DAEΔALUS experiment (MIT, BEST, INFN-LNS) and the BCSI 70 MeV H⁻ cyclotron.

MOPPT032

Status Report and New Developments at iThemba LABS

cyclotron, ion, controls, ion-source

94

J.L. Conradie, L.S. Anthony, R.A. Bark, J.C. Cornell, J.G. De Villiers, H. Du Plessis, J.S. Du Toit, W. Duckitt, D.T. Fourie, M.E. Hogan, I.H. Kohler, C. Lussi, R.H. McAlister, H.W. Mostert, J.V. Pilcher, P.F. Rohwer, M. Sakildien, N. Stodart, R.W. Thomae, M.J. Van Niekerk, P.A. van Schalkwyk
iThemba LABS, Somerset West, South Africa

iThemba LABS is a multidisciplinary research facility in the fields of nuclear physics research, neutron therapy, proton therapy and radionuclide production. Three long running projects, the construction of a new ECR ion source, a beam phase measuring system for the separated-sector cyclotron comprising 21 fixed probes and an RF amplitude and phase monitoring system for the 16 RF systems have been completed. The first results will be reported. The status of the newly developed low-level RF control system will be discussed and an interactive magnetic field calculation method for an injector cyclotron, making use of a data base developed from calculations with the computer program TOSCA, will be presented. Plans to save on the power consumption of the accelerators will be reported on. The beam statistics and the progress with the planning of a radioactive ion beam facility will be discussed.

TUPPT008

A Profile Analysis Method for High-Intensity DC Beams Using a Thermographic Camera

target, neutron, background, beam-transport

168

K. Katagiri, S. Hojo, T. Honma, A. Noda, K. Noda
NIRS, Chiba-shi, Japan

A new analysis method for the digital-image processing apparatus has been developed to evaluate profiles of high-intensity DC beams from temperature images of irradiated-thin foils. Numerical calculations were performed to examine the reliability and the performance of the profile analysis method. To simulate the temperature images acquired by a thermographic camera, temperature distributions were numerically calculated for various beam parameters. The noises in the temperature images, which are added by the camera sensor, were also simulated to be taken its effect into account. By using the profile analysis method, the beam profiles were evaluated from the simulated-temperature images, and they were compared with the exact solution of the beam profiles. We found that the profile analysis method is adaptable over a wide beam current range of ~0.1 – 10 μA, even if a general-purpose thermographic camera with rather high noise (NETD ~ 0.3 K, NETD: Noise Equivalent Temperature Difference) is employed.

TUPPT010

Variants of Grounding and Shielding in a Beam Diagnostics Measurement of Low Signal Currents

coupling, shielding, high-voltage, impedance

174

R. Dölling
PSI, Villigen PSI, Switzerland

The performance of several variants of grounding and shielding of long measurements cables for small currents against ground potential differences has been estimated analytically.

TU3PB02

Development of a Scintillator Probe Based on Fiber Optics for Radial Beam Diagnostics of the Ion Beam of the 88-Inch Cyclotron

cyclotron, ion, extraction, controls

262

M.M. Strohmeier, J.Y. Benitez, M.K. Covo, C.M. Lyneis, B. Ninemire, L. Phair, P. Pipersky, D.S. Todd
LBNL, Berkeley, California, USA
K.Y. Franzen
Mevion, Littleton, Massachusetts, USA

Operators at the 88-Inch Cyclotron have many tuning parameters to optimize transmission from injection through extraction. However, the only diagnostics they have had were a Faraday Cup at the exit of the machine and a so called "Dee-Probe" which gives a current-vs-radius (IvR) measurement. Motivated by low transmission of the Cyclotron and to address how tuning can affect the beam, we have developed an optical beam viewer whose radial position within the cyclotron can be adjusted remotely. This viewer allows us to image the beam cross section and its axial position with very high spatial resolution as a function of radius. In this paper, we describe the mechanical development of the device which consists of a Kbr scintillator crystal, a fiber bundle and a digital camera and we present data from its initial commissioning.

Slides TU3PB02 [4.936 MB]