Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source

The magnet measurement methods for a multipole superconducting wiggler using the Hall probes and stretched wire are described. The results of magnet measurements for the 63-pole superconducting wiggler are presented. The measurements have been carried out in the bath cryostat (with the Hall probes...

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Дата:	2006
Автори:	Bekhtenev, E.A., Kuzin, M.V., Khruschev, S.V., Mezentsev, N.A., Miginsky, E.G., Shkaruba, V.A., Tsukanov, V.M.
Формат:	Стаття
Мова:	English
Опубліковано:	Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2006
Назва видання:	Вопросы атомной науки и техники
Теми:	Применение ускорителей в радиационных технологиях
Онлайн доступ:	http://dspace.nbuv.gov.ua/handle/123456789/78881
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Назва журналу:	Digital Library of Periodicals of National Academy of Sciences of Ukraine
Цитувати:	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source / E.A. Bekhtenev, M.V. Kuzin, S.V. Khruschev, N.A. Mezentsev, E.G. Miginsky, V.A. Shkaruba, V.M. Tsukanov // Вопросы атомной науки и техники. — 2006. — № 2. — С. 175-177. — Бібліогр.: 4 назв. — анл.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine

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spelling	irk-123456789-788812015-03-23T03:02:21Z Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source Bekhtenev, E.A. Kuzin, M.V. Khruschev, S.V. Mezentsev, N.A. Miginsky, E.G. Shkaruba, V.A. Tsukanov, V.M. Применение ускорителей в радиационных технологиях The magnet measurement methods for a multipole superconducting wiggler using the Hall probes and stretched wire are described. The results of magnet measurements for the 63-pole superconducting wiggler are presented. The measurements have been carried out in the bath cryostat (with the Hall probes temperature 4.2 K) as well as in its own cryostat using a special scanning room temperature antechamber. Описаны методы магнитных измерений для многополюсного сверхпроводящего вигглера с использованием датчиков Холла и натянутой проволоки с током. Приведены результаты магнитных измерений 63-полюсного сверхпроводящего вигглера в погруженном (при температуре датчиков Холла 4.2 К) и собственном (с иcпользованием специальной сканирующей аванкамеры комнатной температуры) криостатах. Описано методи магнітних вимірів для багатополюсного надпровідного вігглера з використанням датчиків Холу й натягнутого дроту зі струмом. Наведено результати магнітних вимірів 63-полюсного надпровідного вігглера в зануреному (при температурі датчиків Холу 4.2 К) і особистому (з використанням спеціальної скануючьої аванкамери кімнатної температури) кріостатах. 2006 Article Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source / E.A. Bekhtenev, M.V. Kuzin, S.V. Khruschev, N.A. Mezentsev, E.G. Miginsky, V.A. Shkaruba, V.M. Tsukanov // Вопросы атомной науки и техники. — 2006. — № 2. — С. 175-177. — Бібліогр.: 4 назв. — анл. 1562-6016 PACS: 07.55.Ge http://dspace.nbuv.gov.ua/handle/123456789/78881 en Вопросы атомной науки и техники Національний науковий центр «Харківський фізико-технічний інститут» НАН України
institution	Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection	DSpace DC
language	English
topic	Применение ускорителей в радиационных технологиях Применение ускорителей в радиационных технологиях
spellingShingle	Применение ускорителей в радиационных технологиях Применение ускорителей в радиационных технологиях Bekhtenev, E.A. Kuzin, M.V. Khruschev, S.V. Mezentsev, N.A. Miginsky, E.G. Shkaruba, V.A. Tsukanov, V.M. Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source Вопросы атомной науки и техники
description	The magnet measurement methods for a multipole superconducting wiggler using the Hall probes and stretched wire are described. The results of magnet measurements for the 63-pole superconducting wiggler are presented. The measurements have been carried out in the bath cryostat (with the Hall probes temperature 4.2 K) as well as in its own cryostat using a special scanning room temperature antechamber.
format	Article
author	Bekhtenev, E.A. Kuzin, M.V. Khruschev, S.V. Mezentsev, N.A. Miginsky, E.G. Shkaruba, V.A. Tsukanov, V.M.
author_facet	Bekhtenev, E.A. Kuzin, M.V. Khruschev, S.V. Mezentsev, N.A. Miginsky, E.G. Shkaruba, V.A. Tsukanov, V.M.
author_sort	Bekhtenev, E.A.
title	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source
title_short	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source
title_full	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source
title_fullStr	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source
title_full_unstemmed	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source
title_sort	magnetic measurements of the 63-pole 2 tesla superconducting wiggler for canadian light source
publisher	Національний науковий центр «Харківський фізико-технічний інститут» НАН України
publishDate	2006
topic_facet	Применение ускорителей в радиационных технологиях
url	http://dspace.nbuv.gov.ua/handle/123456789/78881
citation_txt	Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source / E.A. Bekhtenev, M.V. Kuzin, S.V. Khruschev, N.A. Mezentsev, E.G. Miginsky, V.A. Shkaruba, V.M. Tsukanov // Вопросы атомной науки и техники. — 2006. — № 2. — С. 175-177. — Бібліогр.: 4 назв. — анл.
series	Вопросы атомной науки и техники
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first_indexed	2025-07-06T02:58:42Z
last_indexed	2025-07-06T02:58:42Z
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fulltext	MAGNETIC MEASUREMENTS OF THE 63-POLE 2 TESLA SUPERCON- DUCTING WIGGLER FOR CANADIAN LIGHT SOURCE E.A. Bekhtenev, M.V. Kuzin, S.V. Khruschev, N.A. Mezentsev, E.G. Miginsky, V.A. Shkaru- ba, V.M. Tsukanov Budker INP, Novosibirsk, Russia E-mail: V.M.Tsukanov@inp.nsk.su Fax: +7-383-330-2163 Phone: +7-383-339-4427 The magnet measurement methods for a multipole superconducting wiggler using the Hall probes and stretched wire are described. The results of magnet measurements for the 63-pole superconducting wiggler are presented. The measurements have been carried out in the bath cryostat (with the Hall probes temperature 4.2 K) as well as in its own cryostat using a special scanning room temperature antechamber. PACS: 07.55.Ge 1. INTRODUCTION The superconducting wiggler under discussion was designed and fabricated in accordance with the contract between Budker INP and Canadian Light Source, Saskatchewan, Canada. The superconducting wiggler is an array of alternating sign dipole magnets immersed into liquid helium. The vacuum chamber is a part of a liquid helium vessel and is inserted into a pole gap. A copper liner with a temperature 20 K is inserted inside the vacuum chamber to prevent heating of the liquid he- lium vessel excited by an electron beam. Space avail- able for the electron beam is defined by the copper liner and equal to 50×9.5 mm. The wiggler magnet system should satisfy the con- tract requirements for field quality to predict an influ- ence of the wiggler field on a beam dynamics. The simi- lar work was done by Budker INP for other supercon- ducting insertion devices for various SR centers [1,2]. In order to check the field quality during the wiggler fabri- cation and after wiggler assembling inside its own cryo- stat, magnetic field measuring systems were used. The main problems during the magnetic measurements are a low temperature (4.2 K and 20 K) and a very small space for the magnetic field probes. The magnet and cryogenic design of the wiggler are presented in [3]. 2. MAGNETIC MEASUREMENTS IN THE BATH CRYOSTAT After the fabrication and assembling of the wiggler magnetic system, it was tested in the bath cryostat. The magnetic measurements have been carried out by using an array of five LakeShore Hall probes which were placed inside the liquid helium at 4.2 K. The Hall probes were mounted on a rotating disk with a rotation angle of 90 degrees. In spite of that the Hall probes were previously calibrated at 4.2 K and high level field value, there is no guarantee that calibration will be the same after subsequent cooling down. In order to increase the field quality measurements, a relative calibration proce- dure was performed first. For the calibration procedure, the Hall probes array was rotated in such a way that the probes are going in one way following one another for the relative probes calibration. The next measurements have been carried out when the probes are placed per- pendicular to the motion direction. In this case, during the probes movement, the magnetic map in one plane has been measured. 3. MAGNETIC MEASUREMENTS IN THE OWN CRYOSTAT The magnetic measurements of the wiggler assem- bled within its own cryostat have been done with the use of a special scanning measuring system. The assembled wiggler length from flange to flange is about 2.2 meters. As was mentioned above, the accessible space for the magnetic measurements is 9.5×50 mm and is defined by the copper liner (at the temperature about 20 K). Thus, to make the magnetic measurement conduct- ing at a room temperature, an antechamber has been used inside the copper liner. This is a titanium tube with an internal diameter of 6 mm (see Fig.1). This tube is movable and is a part of the scanning system. There are two types of the measurements that can be done with this tube − the magnetic map measurements with the use of the Hall probe inside the tube and the field integrals measurements with a wire with a current placed inside the tube. The scanning range of the tube is ±15 mm in the horizontal plane and ±1 mm in the vertical plane (at the central horizontal position only). The photo of the one part of the system is presented in Fig.2. Fig.1. The copper liner and the tube positions All control and measuring equipment is produced according to the VME standard. 3.1. WIGGLER MAGNETIC MAP MEASURING Due to a small internal size of the tube only two Hall probes are used for the magnetic map measurements. These two probes were mounted perpendicular one an- other to measure simultaneously the vertical By and hor- izontal Bx magnetic field components. 3-D magnetic field map is a result of scanning of tube ends in X and Y __________________________________________________________ PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 2. Series: Nuclear Physics Investigations (46), p.175-177. 175 directions and the Hall probes movement inside the tube with appropriate steps. Fig.2. Photo of the scanning part of the system Simultaneous measurements of the magnetic field components Bx and By give a possibility to make correc- tion to the magnetic field strength in the median plane in case of the Hall probes rotation as whole during longitu- dinal scanning. The minimum step between the mea- surements along the wiggler is 0.1 mm. Fig.4,a and Fig.4,b show Bx and By field components behavior along the wiggler at 2 T magnetic field. The angle and the full magnetic field value taking into ac- count both the field components are presented in Fig.4,c and Fig.4,d, correspondingly. An overlapping of 5 lon- gitudinal passes of the Hall probe with the horizontal coordinate at -10 mm, -5 mm, 0 mm, 5 mm, 10 mm at the field of 2 Tesla are presented in Fig.3. 3.2. FIELD INTEGRALS MEASUREMENTS A stretched wire method was used for the magnetic field integrals measurements. This method has been al- ready applied for previous wigglers measurements [4]. In the proposed wiggler field integrals measure- ments, the Hall probes were replaced by a wire with a current. The DC current of the wire is 2 A. The wire was stretched with force of 19N for modeling of 2.9 GeV electron beam. The AC current with 1.125 MHz are used for wire position monitoring during the measurements. The measurement precision of the ± 1 mkm corresponds to the 2 Gscm of the first field in- tegral and 500 Gscm2 for the second field integral. The scheme of the wire method is presented in Fig.5. Fig.3. Overlapping of 5 longitudinal passes of the Hall probe with the horizontal coordinate of -10 mm, -5 mm, 0 mm, 5 mm, 10 mm at the field of 2 Tesla 0 200 400 600 800 1000 1200 -2 -1 0 1 2 B H al l1 Z mm. a) 0 200 400 600 800 1000 1200 -1.0 -0.5 0.0 0.5 B H al l2 X Axis Titleb) 0 200 400 600 800 1000 1200 -30 -20 -10 0 10 20 30 A ng le g ra d Z mm c) 0 200 400 600 800 1000 1200 -2 -1 0 1 2 B Z mm. d) Fig.4. Results of the magnetic field measurements at 2 Tesla magnetic field: (a)Bz field component, __________________________________________________________ PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. 2006. № 2. Series: Nuclear Physics Investigations (46), p.175-177. 175 (b) By field component, (c) rotating angle of the Hall probes (degree), (d)full magnetic field X Z F z x ADC I=0..2A VME 1.125МГЦ F Filter комму татор Fig.5. The scheme of the stretched wire method A dynamical stability of the first and second integral during ramping up and down of the wiggler field with the help of the stretched wire method was tested. The results are shown in Fig.6 and Fig.7. 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 Time, min 0 0.5 1 1.5 2 2.5 B , Tesla -0.001 -0.0005 0 0.0005 0.001 1s t i nt eg ra l, Te sl a* m 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Time, min 0 0.5 1 1.5 2 2.5 B , Tesla -0.001 -0.0005 0 0.0005 0.001 1s t i nt eg ra l, Te sl a* m 1st Integral B, Tesla 1st integral, Teslam Fig.6. First field integral behavior during ramping up of the wiggler field RESUME The magnetic field measurements of the supercon- ducting multipole wiggler were carried out under condi- tions of the very low temperature and small available space. The results are in good agreement with the calcu- lations and the contract requirements. 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 Time, min 0 0.5 1 1.5 2 2.5 B , Tesla -0.0003 -0.0002 -0.0001 0 0.0001 0.0002 0.0003 2n d in te gr al , T es la m 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Time, min 0 0.5 1 1.5 2 2.5 B , Tesla -0.0003 -0.0002 -0.0001 0 0.0001 0.0002 0.0003 2n d in te gr al , T es la m 2 2nd Integral B, Tesla 2nd integral, Teslam2 Fig.7. Second field integral behavior during ramping up of the wiggler field REFERENCES 1. M.G. Fedurin, M.V. Kuzin, N.A. Mezentsev, V.A. Shkaruba. Status of the activity on fabrication and application of the high-field superconducting wigglers in Budker INP // Nucl. Instrum. and Meth- ods. 2001, v.A470, №1-2, p.34-37. 2. A. Batrakov, V. Jurba, S. Khrushchev et al. A Su- perconducting 3.5 T multipole wiggler for the ELETTRA storage ring. Proc. of EPAC-2002, Paris, France. 2002, p.2634-2636. 3. S.V. Khruschev, E.A. Kuper, V.H. Lev et al. Super- conducting 63-pole 2 Tesla wiggler for canadian light source // this issue, p.172-174. 4. A. Batrakov, V. Borovikov, E. Bekhtenev et al. Magnetic measurements of the 10 T superconduct- ing wiggler for the SPring-8 storage ring. 7th Inter- national conference on synchrotron radiation instru- mentation: Abstract POS1-018. 2000, Germany, Berlin: BESSY. МАГНИТНЫЕ ИЗМЕРЕНИЯ 63-ПОЛЮСНОГО СВЕРХПРОВОДЯЩЕГО ВИГГЛЕРА С ПОЛЕМ 2 ТЕСЛА ДЛЯ КАНАДСКОГО ИСТОЧНИКА СИНХРОТРОННОГО ИЗЛУЧЕНИЯ Е.А. Бехтенев, М.В. Кузин, С.В. Хрущев, Н.А. Мезенцев, Е.Г. Мигинская, В.А. Шкаруба, В.М. Цуканов Описаны методы магнитных измерений для многополюсного сверхпроводящего вигглера с использова- нием датчиков Холла и натянутой проволоки с током. Приведены результаты магнитных измерений 63-по- люсного сверхпроводящего вигглера в погруженном (при температуре датчиков Холла 4.2 К) и собственном (с иcпользованием специальной сканирующей аванкамеры комнатной температуры) криостатах. МАГНІТНІ ВИМІРИ 63-ПОЛЮСНОГО НАДПРОВІДНОГО ВІГГЛЕРА З ПОЛЕМ 2 ТЕСЛА ДЛЯ КАНАДСЬКОГО ДЖЕРЕЛА СИНХРОТРОННОГО ВИПРОМІНЮВАННЯ Є.А. Бехтенєв, М.В. Кузін, С.В. Хрущьов, М.А. Мезенцев, Є.Г. Мігінська, В.А. Шкаруба, В.М. Цуканов Описано методи магнітних вимірів для багатополюсного надпровідного вігглера з використанням датчиків Холу й натягнутого дроту зі струмом. Наведено результати магнітних вимірів 63-полюсного надпровідного вігглера в зануреному (при температурі датчиків Холу 4.2 К) і особистому (з використанням спеціальної скануючьої аванкамери кімнатної температури) кріостатах. 168 магнитные измерения 63-полюсного сверхпроводящего вигглера с полем 2 тесла для канадского источника синхротронного излучения Описаны методы магнитных измерений для многополюсного сверхпроводящего вигглера с использованием датчиков Холла и натянутой проволоки с током. Приведены результаты магнитных измерений 63-полюсного сверхпроводящего вигглера в погруженном (при температуре датчиков Холла 4.2 К) и собственном (с иcпользованием специальной сканирующей аванкамеры комнатной температуры) криостатах.

Magnetic measurements of the 63-pole 2 Tesla superconducting wiggler for Canadian Light Source

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