RuPAC2021 - List of Keywords (extraction)

Paper	Title	Other Keywords	Page
MOB01	Status of U-70	proton, flattop, power-supply, neutron	20
	V.A. Kalinin, A.G. Afonin, Y.M. Antipov, N.A. Ignashin, S.V. Ivanov, V.G. Lapygin, O.P. Lebedev, A. Maksimov, Yu.V. Milichenko, A.P. Soldatov, S.A. Strekalovskikh, S.E. Sytov, N.E. Tyurin, D.A. Vasiliev, A.M. Zaitsev IHEP, Moscow Region, Russia
	The report overviews present status of the Accelerator Complex U-70 at IHEP of NRC "Kurchatov Institute" (Protvino). The emphasis is put on the recent activity and upgrades implemented since the previous conference RuPAC-2018, in a run-by-run chronological ordering.
	Slides MOB01 [9.373 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOB01
About •	Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA39	Application of a Scintillation Detector for Periodic Monitoring of Beam Parameters at Medical Proton Therapy Complex "Prometheus"	proton, detector, radiation, synchrotron	176
	A.E. Shemyakov, Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.I. Shestopalov PhTC LPI RAS, Protein, Moscow region, Russia Belikhin, M.A. Belikhin, A.A. Pryanichnikov MSU, Moscow, Russia
	Introduction: In November 2015 the first domestic complex of proton therapy "Prometheus" start to treat oncology patients. This complex uses a modern technique for irradiation of tumors by scanning with a pencil beam. This technique requires continuous monitoring and regular verification of main beam parameters such as range in water, focusing and lateral dimension. To control these parameters, we developed a waterproof detector for measurements in air and in a water phantom. Methods and materials: The detector system consists of a luminescent screen 5 cm in diameter, a mirror and a CCD camera. When the beam goes through the screen, a glow appears, the reflected image of which is perceived by the camera and analyzed. This design is waterproof, which makes it possible to perform measurements in water. To measure the range of protons in water, this detector was fixed on a special positioner, which allows to move the sensor with an accuracy of 0.2 mm. We measured the beams also in comparison with EBT3 dosimetric film for energies from 60 to 250 MeV with a step of 10 MeV. Same measurements of the ranges were carried out using a standard PTW Bragg Peak ionization chamber. Results: It was shown that this system is a simple and inexpensive tool for conducting regular quality assurance of beam parameters. Unlike the EBT3 dosimetric film, this detector gives an immediate response, which makes it possible to use it when debugging the accelerator and adjusting the beam.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA39
About •	Received ※ 17 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA48	Simulation of the Electrostatic Deflector of DC140 Cyclotron	septum, cyclotron, beam-losses, ECR	202
	A.S. Zabanov, V.I. Lisov JINR/FLNR, Moscow region, Russia K. Gikal, G.G. Gulbekyan, I.V. Kalagin, N.Yu. Kazarinov, S.V. Mitrofanov, V.A. Semin JINR, Dubna, Moscow Region, Russia
	The main activities of Flerov Laboratory of Nuclear Reactions, following its name - are related to fundamental science, but in parallel a lot of efforts are paid for practical applications. Currently, work is underway to create an irradiation facility based on the DC140 cyclotron for applied research at FLNR. The beam transport system will have three experimental beam lines for testing of electronic components (avionics and space electronics) for radiation hardness, for ion-implantation nanotechnology and for radiation materials science. The DC140 cyclotron is intended to accelerate heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8.25 up to two fixed energies 2.124 and 4.8 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for light ions (A<86) and about 0.1 pmcA for heavier ions (A>132). The extraction system based on four main elements - electrostatic deflector, focusing magnetic channel, Permanent Magnet Quadrupole lens and steering magnet. The results of numerical simulation of the electrostatic deflector of DC140 cyclotron are presented in this this paper.
	Poster MOPSA48 [1.255 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA48
About •	Received ※ 22 August 2021 — Accepted ※ 20 September 2021 — Issued ※ 09 October 2021
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MOPSA49	DC140 Cyclotron, Trajectory Analysis of Beam Acceleration and Extraction	cyclotron, acceleration, operation, injection	205
	I.A. Ivanenko, N.Yu. Kazarinov JINR, Dubna, Moscow Region, Russia V.I. Lisov JINR/FLNR, Moscow region, Russia
	At the present time, the activities on creation of the new heavy-ion isochronous cyclotron DC140 are carried out at Joint Institute for Nuclear Research. DC140 facility is intended for SEE testing of microchip, for production of track membranes and for solving of applied physics problems. Cyclotron will produce accelerated beams of ions A/Z= 5 - 5.5 and 7. 5 - 8.25 with a fixed beam energy 4.8 MeV/n and 2.124 MeV/n respectively. The variation of operation modes is provided by changing of magnetic field in the range 1.4T - 1.55T with fixed generator frequency 8.632 MHz. In this report, the results of design and simulation of the beam acceleration and extraction are presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA49
About •	Received ※ 12 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 02 October 2021
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MOPSA51	The Extraction System of DC140 Cyclotron	cyclotron, emittance, permanent-magnet, simulation	213
	V.I. Lisov, A.A. Protasov, A.S. Zabanov JINR/FLNR, Moscow region, Russia K. Gikal, G.G. Gulbekyan, I.A. Ivanenko, G.N. Ivanov, I.V. Kalagin, N.Yu. Kazarinov, S.V. Mitrofanov, N.F. Osipov, V.A. Semin JINR, Dubna, Moscow Region, Russia
	The main activities of Flerov Laboratory of Nuclear Reactions, following its name - are related to fundamental science, but, in parallel, plenty of efforts are paid for practical applications. For the moment continues the works under creating irradiation facility based on the cyclotron DC140 which will be dedicated machine for applied researches in FLNR. The beam transport system will have three experimental beam lines for testing of electronic components (avionics and space electronics) for radiation hardness, for ion-implantation nanotechnology and for radiation materials science. The DC140 cyclotron is intended for acceleration of heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8.25 up to two fixed energies 2.124 and 4.8 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for light ions (A<86) and about 0.1 pmcA for heavier ions (A>132). The following elements are used to extract the beam from the cyclotron: electrostatic deflector, focusing magnetic channel, Permanent Magnet Quadrupole lens and steering magnet. The design of the beam extraction system of DC140 cyclotron are presented in this report.
	Poster MOPSA51 [0.886 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA51
About •	Received ※ 30 August 2021 — Accepted ※ 20 September 2021 — Issued ※ 24 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB09	Resonance Slow Extraction From Ion Synchrotron for Technological Application	synchrotron, septum, resonance, proton	248
	M.F. Blinov, I. Koop, V.A. Vostrikov BINP SB RAS, Novosibirsk, Russia I. Koop NSU, Novosibirsk, Russia
	Third-order resonance slow extraction from synchrotron is the most common use extraction method for external target experiments nuclear physics, proton and heavy ion therapy, since it can provide relatively stable beams in long time. The principle of third-order resonant slow extraction is intentionally exciting the third-order resonance by controlling detuning and sextupole strength to gradually release particles from inside to outside stable separatrix. BINP develop the ion synchrotron for wide range of technological application. The present paper describes slow extraction method with exiting betatron oscillations by the transverse RF-field. Such extraction technique provides stable current extraction for entire extraction time.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB09
About •	Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 21 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC55	Development of the Low Intensity Extraction Beam Control System at Protom Synchrotron for Proton Radiography Implementation	proton, controls, synchrotron, experiment	439
	A.A. Pryanichnikov, Belikhin, M.A. Belikhin, A.E. Shemyakov, P.B. Zhogolev PhTC LPI RAS, Protvino, Russia Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.E. Shemyakov, P.B. Zhogolev Protom Ltd., Protvino, Russia Belikhin, M.A. Belikhin, A.P. Chernyaev, A.A. Pryanichnikov MSU, Moscow, Russia V. Rykalin ProtonVDA, Naperville, Illinois, USA
	Currently, the calculation of the proton range in patients receiving proton therapy is based on the conversion of Hounsfield CT units of the patient’s tissues into the relative stopping power of protons. Proton radiography is able to reduce these uncertainties by directly measuring proton stopping power. However, proton imaging systems cannot handle the proton beam intensities used in standard proton therapy. This means that for implementation of proton radiography it is necessary to reduce the intensity of the protons significantly. This study demonstrates the current version of the new beam control system for low proton intensity extraction. The system is based on automatic removable unit with special luminescence film and sensitive photoreceptor. Using of the removable module allows us to save initial parameters of the therapy beam. Remote automatic control of this unit will provide switch therapy and imaging modes between synchrotron cycles. The work describes algorithms of low flux beam control, calibration procedures and experimental measurements. Measurements and calibration procedures were performed with certified Protom Faraday Cup, PTW Bragg Peak Chamber and specially designed experimental external detector. The development can be implemented in any proton therapy complexes based on the Protom synchrotron. This allow us to use initial synchrotron beam as a tool for patient verification and to eliminate proton range uncertainties.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC55
About •	Received ※ 17 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 04 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRB02	Accelerators of ELV Series: Current Status and Further Development	electron, operation, power-supply, status	111
	D.S. Vorobev, E.V. Domarov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, D.A. Kogut, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov BINP SB RAS, Novosibirsk, Russia
	For many years Budker Institute of Nuclear Physics produces medium-energy industrial electron beam accelerators. Flexible (due to the possibility of completing with different systems) and reliable accelerators cover the energy range from 0.3 to 3 MeV, and up to 130 mA of beam current, with power up to 100 kW. High electrical efficiency allows the use of accelerators in almost all areas of radiation technology, from cross-linking of the insulation, heat shrinkable tubes and films to the production of foamed polyethylene and modification of rubber blanks for tires. All models have a unified design with a difference in overall dimensions, the length of the accelerating tube, the number of high-voltage rectifier sections, and the type of extraction device. This makes it easy to adapt the accelerators to the requirements of the technology line. ELV accelerator with an energy range of 0.3-0.5 MeV, beam current up to 130 mA, and power up to 100 kW was successfully designed, tested, and installed on the customer’s site. The accelerator is compact in overall dimensions and installed in the local steel shielding. The electron beam is extracted through a two-windows extraction system with one titanium foil 180 mm wide. New accelerators of the ELV type are also being developed. Namely ELV-15 with energy range up to 3.0 MeV and power up to 100 kW. At present time accelerator was assembled and under testing in Novosibirsk.
	Slides FRB02 [5.380 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB02
About •	Received ※ 26 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 11 October 2021
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FRB03	Upgrated the Extraction Device of Focused Electron Beam Into the Atmosphere	electron, focusing, cathode, permanent-magnet	114
	E.V. Domarov, I. Chakin, V.G. Cherepkov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov BINP SB RAS, Novosibirsk, Russia
	For over 30 years, an extraction device has been successfully working in BINP at the ELV-6 accelerator to extract a focused beam of electrons into the atmosphere. The accelerating tube with permanent magnetic lenses was used in this installation. The design of these accelerator tubes with magnetic lenses is rather complicated. Recently, simpler design and high reliability accelerating tubes with big aperture is operating in ELV accelerators. For this reason, the problem number one at present is to develop the extraction device, capable of reliably working with serial accelerator tubes, of the ELV accelerator with power up to100 kW. The lens L1 is located directly at the lower end of the accelerating tube. Passing the lens L1, the beam is focused near the diaphragm D6 and increases to a diameter of 10 mm in the diaphragm D5. For passing the beam along the axis of the diaphragms, there are corrections coils C1 C2 C3. The diameter of diaphragm hole D1 is the most critical, because it determines the flow of gas that should be pumped out in the following steps of the vacuum system. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. As a result of the made experiments the minimum diameter of the beam at the exit from the extractions device has been 2 mm at the energy of 1,4 MeV and the beam current of 60 mA.
	Slides FRB03 [2.785 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB03
About •	Received ※ 02 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 19 October 2021
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FRB05	Updated Status of Protom Synchrotrons for Radiation Therapy	proton, synchrotron, radiation, injection	120
	A.A. Pryanichnikov, V. Alexandrov, V.E. Balakin, A.I. Bazhan, Belikhin, M.A. Belikhin, V.I. Chashurin, P.A. Lunev, A.E. Shemyakov, A.I. Shestopalov PhTC LPI RAS, Protvino, Russia V. Alexandrov, V.E. Balakin, A.I. Bazhan, Belikhin, M.A. Belikhin, P.A. Lunev, A.A. Pryanichnikov, A.E. Shemyakov, A.I. Shestopalov Protom Ltd., Protvino, Russia
	Physical-Technical Center of P.N. Lebedev Physical Institute of RAS and Protom Ltd. are engaged in development and implantation of synchrotrons for proton therapy into clinical practice. There are two proton therapy complexes "Prometheus" in Russia. That are fully developed and manufactured at Physical-Technical Center and Protom. Every day patients with head and neck cancer get treatment using "Prometheus" at the A. Tsyb Medical Radiological Research Center. At the moment these facilities together have accumulated more than 5 years of clinical experience. Two facilities are based on the Protom synchrotrons in the USA. One operates at the McLaren Hospital PT Center, it started to treat patients in 2018. Another one is as a part of the single-room proton therapy system "Radiance330" in Massachusetts General Hospital, that went into clinical operations in 2020. The first Israel proton therapy complex based on Protom synchrotron was launched in 2019. Protom facilities provide full stack of modern proton therapy technologies such as IMPT and pencil beam scanning. Key features of Protom synchrotron: low weight, compact size and low power consumption allow it to be placed in conventional hospitals without construction of any special infrastructure. This report presents current data on accelerator researches and developments of Physical-Technical Center and Protom Ltd. In addition, it provides data on the use of Protom based proton therapy complexes under the clinical conditions.
	Slides FRB05 [8.949 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB05
About •	Received ※ 19 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOB01

Status of U-70

proton, flattop, power-supply, neutron

20

V.A. Kalinin, A.G. Afonin, Y.M. Antipov, N.A. Ignashin, S.V. Ivanov, V.G. Lapygin, O.P. Lebedev, A. Maksimov, Yu.V. Milichenko, A.P. Soldatov, S.A. Strekalovskikh, S.E. Sytov, N.E. Tyurin, D.A. Vasiliev, A.M. Zaitsev
IHEP, Moscow Region, Russia

The report overviews present status of the Accelerator Complex U-70 at IHEP of NRC "Kurchatov Institute" (Protvino). The emphasis is put on the recent activity and upgrades implemented since the previous conference RuPAC-2018, in a run-by-run chronological ordering.

Slides MOB01 [9.373 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOB01

About •

Received ※ 07 October 2021 — Revised ※ 08 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 14 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA39

Application of a Scintillation Detector for Periodic Monitoring of Beam Parameters at Medical Proton Therapy Complex "Prometheus"

proton, detector, radiation, synchrotron

176

A.E. Shemyakov, Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.I. Shestopalov
PhTC LPI RAS, Protein, Moscow region, Russia
Belikhin, M.A. Belikhin, A.A. Pryanichnikov
MSU, Moscow, Russia

Introduction: In November 2015 the first domestic complex of proton therapy "Prometheus" start to treat oncology patients. This complex uses a modern technique for irradiation of tumors by scanning with a pencil beam. This technique requires continuous monitoring and regular verification of main beam parameters such as range in water, focusing and lateral dimension. To control these parameters, we developed a waterproof detector for measurements in air and in a water phantom. Methods and materials: The detector system consists of a luminescent screen 5 cm in diameter, a mirror and a CCD camera. When the beam goes through the screen, a glow appears, the reflected image of which is perceived by the camera and analyzed. This design is waterproof, which makes it possible to perform measurements in water. To measure the range of protons in water, this detector was fixed on a special positioner, which allows to move the sensor with an accuracy of 0.2 mm. We measured the beams also in comparison with EBT3 dosimetric film for energies from 60 to 250 MeV with a step of 10 MeV. Same measurements of the ranges were carried out using a standard PTW Bragg Peak ionization chamber. Results: It was shown that this system is a simple and inexpensive tool for conducting regular quality assurance of beam parameters. Unlike the EBT3 dosimetric film, this detector gives an immediate response, which makes it possible to use it when debugging the accelerator and adjusting the beam.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA39

About •

Received ※ 17 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA48

Simulation of the Electrostatic Deflector of DC140 Cyclotron

septum, cyclotron, beam-losses, ECR

202

A.S. Zabanov, V.I. Lisov
JINR/FLNR, Moscow region, Russia
K. Gikal, G.G. Gulbekyan, I.V. Kalagin, N.Yu. Kazarinov, S.V. Mitrofanov, V.A. Semin
JINR, Dubna, Moscow Region, Russia

The main activities of Flerov Laboratory of Nuclear Reactions, following its name - are related to fundamental science, but in parallel a lot of efforts are paid for practical applications. Currently, work is underway to create an irradiation facility based on the DC140 cyclotron for applied research at FLNR. The beam transport system will have three experimental beam lines for testing of electronic components (avionics and space electronics) for radiation hardness, for ion-implantation nanotechnology and for radiation materials science. The DC140 cyclotron is intended to accelerate heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8.25 up to two fixed energies 2.124 and 4.8 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for light ions (A<86) and about 0.1 pmcA for heavier ions (A>132). The extraction system based on four main elements - electrostatic deflector, focusing magnetic channel, Permanent Magnet Quadrupole lens and steering magnet. The results of numerical simulation of the electrostatic deflector of DC140 cyclotron are presented in this this paper.

Poster MOPSA48 [1.255 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA48

About •

Received ※ 22 August 2021 — Accepted ※ 20 September 2021 — Issued ※ 09 October 2021

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MOPSA49

DC140 Cyclotron, Trajectory Analysis of Beam Acceleration and Extraction

cyclotron, acceleration, operation, injection

205

I.A. Ivanenko, N.Yu. Kazarinov
JINR, Dubna, Moscow Region, Russia
V.I. Lisov
JINR/FLNR, Moscow region, Russia

At the present time, the activities on creation of the new heavy-ion isochronous cyclotron DC140 are carried out at Joint Institute for Nuclear Research. DC140 facility is intended for SEE testing of microchip, for production of track membranes and for solving of applied physics problems. Cyclotron will produce accelerated beams of ions A/Z= 5 - 5.5 and 7. 5 - 8.25 with a fixed beam energy 4.8 MeV/n and 2.124 MeV/n respectively. The variation of operation modes is provided by changing of magnetic field in the range 1.4T - 1.55T with fixed generator frequency 8.632 MHz. In this report, the results of design and simulation of the beam acceleration and extraction are presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA49

About •

Received ※ 12 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 02 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA51

The Extraction System of DC140 Cyclotron

cyclotron, emittance, permanent-magnet, simulation

213

V.I. Lisov, A.A. Protasov, A.S. Zabanov
JINR/FLNR, Moscow region, Russia
K. Gikal, G.G. Gulbekyan, I.A. Ivanenko, G.N. Ivanov, I.V. Kalagin, N.Yu. Kazarinov, S.V. Mitrofanov, N.F. Osipov, V.A. Semin
JINR, Dubna, Moscow Region, Russia

The main activities of Flerov Laboratory of Nuclear Reactions, following its name - are related to fundamental science, but, in parallel, plenty of efforts are paid for practical applications. For the moment continues the works under creating irradiation facility based on the cyclotron DC140 which will be dedicated machine for applied researches in FLNR. The beam transport system will have three experimental beam lines for testing of electronic components (avionics and space electronics) for radiation hardness, for ion-implantation nanotechnology and for radiation materials science. The DC140 cyclotron is intended for acceleration of heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8.25 up to two fixed energies 2.124 and 4.8 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for light ions (A<86) and about 0.1 pmcA for heavier ions (A>132). The following elements are used to extract the beam from the cyclotron: electrostatic deflector, focusing magnetic channel, Permanent Magnet Quadrupole lens and steering magnet. The design of the beam extraction system of DC140 cyclotron are presented in this report.

Poster MOPSA51 [0.886 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA51

About •

Received ※ 30 August 2021 — Accepted ※ 20 September 2021 — Issued ※ 24 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB09

Resonance Slow Extraction From Ion Synchrotron for Technological Application

synchrotron, septum, resonance, proton

248

M.F. Blinov, I. Koop, V.A. Vostrikov
BINP SB RAS, Novosibirsk, Russia
I. Koop
NSU, Novosibirsk, Russia

Third-order resonance slow extraction from synchrotron is the most common use extraction method for external target experiments nuclear physics, proton and heavy ion therapy, since it can provide relatively stable beams in long time. The principle of third-order resonant slow extraction is intentionally exciting the third-order resonance by controlling detuning and sextupole strength to gradually release particles from inside to outside stable separatrix. BINP develop the ion synchrotron for wide range of technological application. The present paper describes slow extraction method with exiting betatron oscillations by the transverse RF-field. Such extraction technique provides stable current extraction for entire extraction time.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB09

About •

Received ※ 30 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 21 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC55

Development of the Low Intensity Extraction Beam Control System at Protom Synchrotron for Proton Radiography Implementation

proton, controls, synchrotron, experiment

439

A.A. Pryanichnikov, Belikhin, M.A. Belikhin, A.E. Shemyakov, P.B. Zhogolev
PhTC LPI RAS, Protvino, Russia
Belikhin, M.A. Belikhin, A.A. Pryanichnikov, A.E. Shemyakov, P.B. Zhogolev
Protom Ltd., Protvino, Russia
Belikhin, M.A. Belikhin, A.P. Chernyaev, A.A. Pryanichnikov
MSU, Moscow, Russia
V. Rykalin
ProtonVDA, Naperville, Illinois, USA

Currently, the calculation of the proton range in patients receiving proton therapy is based on the conversion of Hounsfield CT units of the patient’s tissues into the relative stopping power of protons. Proton radiography is able to reduce these uncertainties by directly measuring proton stopping power. However, proton imaging systems cannot handle the proton beam intensities used in standard proton therapy. This means that for implementation of proton radiography it is necessary to reduce the intensity of the protons significantly. This study demonstrates the current version of the new beam control system for low proton intensity extraction. The system is based on automatic removable unit with special luminescence film and sensitive photoreceptor. Using of the removable module allows us to save initial parameters of the therapy beam. Remote automatic control of this unit will provide switch therapy and imaging modes between synchrotron cycles. The work describes algorithms of low flux beam control, calibration procedures and experimental measurements. Measurements and calibration procedures were performed with certified Protom Faraday Cup, PTW Bragg Peak Chamber and specially designed experimental external detector. The development can be implemented in any proton therapy complexes based on the Protom synchrotron. This allow us to use initial synchrotron beam as a tool for patient verification and to eliminate proton range uncertainties.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC55

About •

Received ※ 17 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 04 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRB02

Accelerators of ELV Series: Current Status and Further Development

electron, operation, power-supply, status

111

D.S. Vorobev, E.V. Domarov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, D.A. Kogut, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov
BINP SB RAS, Novosibirsk, Russia

For many years Budker Institute of Nuclear Physics produces medium-energy industrial electron beam accelerators. Flexible (due to the possibility of completing with different systems) and reliable accelerators cover the energy range from 0.3 to 3 MeV, and up to 130 mA of beam current, with power up to 100 kW. High electrical efficiency allows the use of accelerators in almost all areas of radiation technology, from cross-linking of the insulation, heat shrinkable tubes and films to the production of foamed polyethylene and modification of rubber blanks for tires. All models have a unified design with a difference in overall dimensions, the length of the accelerating tube, the number of high-voltage rectifier sections, and the type of extraction device. This makes it easy to adapt the accelerators to the requirements of the technology line. ELV accelerator with an energy range of 0.3-0.5 MeV, beam current up to 130 mA, and power up to 100 kW was successfully designed, tested, and installed on the customer’s site. The accelerator is compact in overall dimensions and installed in the local steel shielding. The electron beam is extracted through a two-windows extraction system with one titanium foil 180 mm wide. New accelerators of the ELV type are also being developed. Namely ELV-15 with energy range up to 3.0 MeV and power up to 100 kW. At present time accelerator was assembled and under testing in Novosibirsk.

Slides FRB02 [5.380 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB02

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Received ※ 26 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 11 October 2021

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FRB03

Upgrated the Extraction Device of Focused Electron Beam Into the Atmosphere

electron, focusing, cathode, permanent-magnet

114

E.V. Domarov, I. Chakin, V.G. Cherepkov, S. Fadeev, M. Golkovsky, Yu.I. Golubenko, A.I. Korchagin, N.K. Kuksanov, A. Lavrukhin, P.I. Nemytov, R.A. Salimov, A.V. Semenov
BINP SB RAS, Novosibirsk, Russia

For over 30 years, an extraction device has been successfully working in BINP at the ELV-6 accelerator to extract a focused beam of electrons into the atmosphere. The accelerating tube with permanent magnetic lenses was used in this installation. The design of these accelerator tubes with magnetic lenses is rather complicated. Recently, simpler design and high reliability accelerating tubes with big aperture is operating in ELV accelerators. For this reason, the problem number one at present is to develop the extraction device, capable of reliably working with serial accelerator tubes, of the ELV accelerator with power up to100 kW. The lens L1 is located directly at the lower end of the accelerating tube. Passing the lens L1, the beam is focused near the diaphragm D6 and increases to a diameter of 10 mm in the diaphragm D5. For passing the beam along the axis of the diaphragms, there are corrections coils C1 C2 C3. The diameter of diaphragm hole D1 is the most critical, because it determines the flow of gas that should be pumped out in the following steps of the vacuum system. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. As a result of the made experiments the minimum diameter of the beam at the exit from the extractions device has been 2 mm at the energy of 1,4 MeV and the beam current of 60 mA.

Slides FRB03 [2.785 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB03

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Received ※ 02 September 2021 — Revised ※ 15 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 19 October 2021

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FRB05

Updated Status of Protom Synchrotrons for Radiation Therapy

proton, synchrotron, radiation, injection

120

A.A. Pryanichnikov, V. Alexandrov, V.E. Balakin, A.I. Bazhan, Belikhin, M.A. Belikhin, V.I. Chashurin, P.A. Lunev, A.E. Shemyakov, A.I. Shestopalov
PhTC LPI RAS, Protvino, Russia
V. Alexandrov, V.E. Balakin, A.I. Bazhan, Belikhin, M.A. Belikhin, P.A. Lunev, A.A. Pryanichnikov, A.E. Shemyakov, A.I. Shestopalov
Protom Ltd., Protvino, Russia

Physical-Technical Center of P.N. Lebedev Physical Institute of RAS and Protom Ltd. are engaged in development and implantation of synchrotrons for proton therapy into clinical practice. There are two proton therapy complexes "Prometheus" in Russia. That are fully developed and manufactured at Physical-Technical Center and Protom. Every day patients with head and neck cancer get treatment using "Prometheus" at the A. Tsyb Medical Radiological Research Center. At the moment these facilities together have accumulated more than 5 years of clinical experience. Two facilities are based on the Protom synchrotrons in the USA. One operates at the McLaren Hospital PT Center, it started to treat patients in 2018. Another one is as a part of the single-room proton therapy system "Radiance330" in Massachusetts General Hospital, that went into clinical operations in 2020. The first Israel proton therapy complex based on Protom synchrotron was launched in 2019. Protom facilities provide full stack of modern proton therapy technologies such as IMPT and pencil beam scanning. Key features of Protom synchrotron: low weight, compact size and low power consumption allow it to be placed in conventional hospitals without construction of any special infrastructure. This report presents current data on accelerator researches and developments of Physical-Technical Center and Protom Ltd. In addition, it provides data on the use of Protom based proton therapy complexes under the clinical conditions.

Slides FRB05 [8.949 MB]

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reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-FRB05

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Received ※ 19 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)