Author: Han, Q.
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TUPYP034
 A New Design of X-ray White Beam Profile Monitor for HEPS Beamlines  
 
  • Q.H. Duan, Q. Han, Z. Li, S. Liu, Z.Y. Yue, Q. Zhang
    IHEP, Beijing, People’s Republic of China
  
  The de­vel­op­ment of x-ray white beam pro­file mon­i­tor is to re­al­ize the vi­sual de­tec­tion of beam con­tour and po­si­tion under the con­di­tion of high en­ergy and high heat load of HEPS fourth-gen­er­a­tion light source. The de­vice in­cludes a elec­tric drive sys­tem, an imag­ing sys­tem, and a cop­per-cooled CVD di­a­mond mon­i­tor. SPEC­TRA and ANSYS were used to ver­ify the mech­a­nism tem­per­a­ture re­li­a­bil­ity when mon­i­tor being used in dif­fer­ent HEPS beam­lines at cur­rent of 200 mA. At the same time, the func­tional ver­i­fi­ca­tion of the ex­per­i­men­tal pro­to­type was car­ried out on the 3W1 high en­ergy test beam­line of BSRF, white beam flu­o­res­cence im­ages were suc­cess­fully ob­tained. Dur­ing the test of Mul­ti­layer Mono­chro­ma­tor for Struc­tural Dv­nam­ics Beam­line(HEPS), the change im­ages of white and mono­chro­matic beam pro­files and curve of in­ten­sity dis­tri­b­u­tion dur­ing crys­tal ad­just­ment are suc­cess­fully ob­tained, which ver­ifi­cates the pro­cess­ing func­tion of the mon­i­tor for beam pro­file and in­ten­sity dis­tri­b­u­tion.  
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TUPYP036
 Mechanical Design of Water-cooled Slits System at HEPS  
 
  • Z. Li, Q.H. Duan, L. Gao, Q. Han, Y.X. Ma, W.F. Sheng, Z.Y. Yue
    IHEP, Beijing, People’s Republic of China
  
  The fourth gen­er­a­tion syn­chro­tron ra­di­a­tion light source cur­rently under con­struc­tion in China has the char­ac­ter­is­tics of high en­ergy and high bright­ness. High En­ergy Pho­ton Source(HEPS) can be used in many basic and en­gi­neer­ing re­search fields, so dif­fer­ent spot sizes are mod­u­lated for dif­fer­ent re­search needs. This de­sign is a ro­tary wa­ter-cooled white beam slit sys­tem, which mainly in­cludes ab­sorber parts and dri­ving mech­a­nism. On the premise of en­sur­ing the in­tegrity of the ab­sorber, the aper­ture is processed in­side the ab­sorber, and the ab­sorber is ro­tated by the dri­ving mech­a­nism, so as to re­al­ize the ad­just­ment of the aper­ture of the slit. The sys­tem has the char­ac­ter­is­tics of com­pact struc­ture, high yield and sim­ple pro­cess­ing, and can achieve the same per­for­mance index while sav­ing time and space costs. At pre­sent, the func­tion of the ex­per­i­men­tal pro­to­type has been ver­i­fied on the 3W1 high en­ergy test beam line of BSRF, and the spot size can be ad­justed.  
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TUPYP038 A Design of an X-Ray Pink Beam Integrated Shutter for HEPS 85
 
  • S. Liu, Q. Han, G. Mo, A.Y. Zhou
    IHEP, Beijing, People’s Republic of China
  
  The main func­tion of the shut­ter is to ac­cu­rately con­trol the ex­po­sure time of the sam­ple so that the sam­ple as well as the de­tec­tor can be pro­tected. In order to cover the high ther­mal load and high en­ergy work­ing en­vi­ron­ment, we de­signed an in­te­grated shut­ter de­vice. The de­vice in­cludes a ther­mal ab­sorber shut­ter, a piezo­elec­tric ce­ramic fast shut­ter, a vac­uum cham­ber and an ad­justable height base. Firstly SPEC­TRA and ANSYS were used to ver­ify the de­vice’s in­sti­tu­tional tem­per­a­ture re­li­a­bil­ity at a ther­mal power den­sity of 64W/mm2. In ad­di­tion, the de­vice is suit­able for both mono­chro­matic and pink light op­er­a­tion with a hor­i­zon­tal pitch of 15mm. The de­vice is also com­pat­i­ble with both vac­uum and at­mos­pheric work­ing en­vi­ron­ments, and the rec­ol­li­ma­tion of the de­vice is not nec­es­sary when switch­ing modes. Fi­nally, the ther­mal ab­sorber shut­ter is also able to func­tion as a beam pro­file mon­i­tor, and the po­si­tion of the spot can be mon­i­tored through a view­ing win­dow on the cav­ity.  
poster icon Poster TUPYP038 [0.781 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP038  
About • Received ※ 08 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 December 2023
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TUPYP039 A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines 88
 
  • S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang
    IHEP, People’s Republic of China
  
  The mono­chro­matic slit is a com­monly used de­vice in HEPS beam­lines. It can limit the syn­chro­tron beam-spot within a de­sired size re­quired by the down­stream op­ti­cal equip­ment. In ad­di­tion, the four-blade struc­ture is the most widely used form of slit. The slit with this form usu­ally con­sists of a pair or two par­al­lel tung­sten car­bide blades. With their edges close to each other, a slit can be formed, and the size of which can be con­trolled by mi­cro­me­chan­i­cal guides. This struc­ture is very suit­able for the case of large beam­size. In this work, we have de­signed a mono­chro­matic slit based on the four-blade form for BF-beam­line in HEPS. It can be used in ul­tra-high vac­uum, high lu­mi­nous flux work­ing en­vi­ron­ment. The max­i­mum open­ing range is up to 30mm*10mm (H*V), while it can allow a white beam of 136mm*24mm (H*V) to pass through. Fur­ther­more, we adopted a point to sur­face con­tact de­sign, which can ef­fec­tively avoid the over-con­straint prob­lem be­tween two guide rails.  
poster icon Poster TUPYP039 [0.457 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039  
About • Received ※ 10 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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TUPYP042
 Vacuum System Design of HEPS Beamlines  
 
  • Y. Tian, Q. Han, H. Shi
    IHEP, Beijing, People’s Republic of China
  
  Vac­uum sys­tem is the basic com­po­nent in High En­ergy Pho­ton Source(HEPS) beam­lines. Only when the op­ti­cal de­vices in beam­lines are op­er­ated in a high vac­uum or even ul­tra-high vac­uum en­vi­ron­ment, can avoid the car­bon de­po­si­tion of the op­ti­cal mir­ror which might re­sult in the op­ti­cal re­flec­tiv­ity re­duc­tion, and re­duce the ab­sorp­tion of syn­chro­tron ra­di­a­tion light by resid­ual gas. The pur­pose of vac­uum sys­tem de­sign is to ob­tain and main­tain a rea­son­able vac­uum de­gree to en­sure the sta­ble op­er­a­tion of the beam­line. This ar­ti­cle in­tro­duces the vac­uum sys­tem de­sign in HEPS beam­lines from the as­pects of pres­sure dis­tri­b­u­tion cal­cu­la­tion, vac­uum ma­te­r­ial se­lec­tion, vac­uum ac­qui­si­tion, mea­sure­ment equip­ment se­lec­tion, vac­uum sys­tem gas des­orp­tion analy­sis and vac­uum equip­ment lay­out. The key point lies in using Mlflow soft­ware based on test par­ti­cle Monte Carlo method to an­a­lyze and sim­u­late the sta­tic pres­sure dis­tri­b­u­tion which is with­out beam through­out the vac­uum sys­tem and the dy­namic pres­sure dis­tri­b­u­tion after beam clean­ing.  
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WEPPP018
 Water-cooled Tungsten Bremsstrahlung Collimator with Adjustable Height for Adapting the Offset of Beamline  
 
  • Z.Q. Gao, Q. Han
    IHEP, Beijing, People’s Republic of China
  
  Bremsstrahlung col­li­ma­tor is a de­vice lo­cated in HPES(High En­ergy Pho­ton Source) beam­line sta­tion. It is used to com­pletely block the pos­si­ble line of sight of the ra­di­a­tion and to prop­erly col­li­mate the bremsstrahlung ra­di­a­tion so that it has a de­fined open­ing angle at col­li­ma­tor exit. Be­cause of the ap­pli­ca­tion in vac­uum and with the aid of bremsstrahlung ray trac­ing a tung­sten block with trans­verse di­men­sion 200 mil­lime­ters is used as the bremsstrahlung stop. In order to adapt the ver­ti­cally beam off­set caused by mono­chro­ma­tor, a lift­ing mech­a­nism which uses step­per motor as dri­ving part is de­signed to ac­com­plish the up and down move­ment of the tung­sten block. To meet the white light mode with high power den­sity of the light beam, which might re­sult in a high-heat-load on the tung­sten block sur­face after the in­ter­ac­tion be­tween syn­chro­tron ra­di­a­tion and block, a wa­ter-cooled struc­ture made of oxy­gen-free cop­per rod with inlet and out­let wa­ter-cool­ing chan­nels is as­sem­bled in front of the tung­sten block. Thus, con­tribut­ing to heat dis­si­pa­tion of the whole struc­ture.  
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WEPPP022
 Structural Design of the First Optics Enclosure (FOE) and Hutch for High Energy Photon Source  
 
  • H. Sun, H. Han, Q. Han
    IHEP, Beijing, People’s Republic of China
  
  The High En­ergy Pho­ton Source (HEPS) will con­struct 15 Beam­lines in the first phase. In order to meet the needs of basic sci­en­tific re­search and pro­tect the per­sonal safety of lab­o­ra­tory per­son­nel, each beam­line is equipped with mul­ti­ple ra­di­a­tion pro­tec­tion sheds, in­clud­ing FOE and Hutch. This paper in­tro­duces the over­all struc­ture of FOE and Hutch, in­clud­ing the basic ra­di­a­tion pro­tec­tion struc­ture de­sign be­tween the wall pan­els of the shed, be­tween the side walls and the roof, and the spe­cial ra­di­a­tion pro­tec­tion struc­ture de­sign for the rel­a­tively weak links of ra­di­a­tion pro­tec­tion such as the ground and wall cor­ners. Ad­di­tion­ally, the strength­en­ing mea­sures for FOE were in­tro­duced. At pre­sent, the struc­tural de­sign of the FOE and Hutch for all line sta­tions has been com­pleted, the in­stal­la­tion of the FOE and Hutch for two line sta­tions has been com­pleted, and the in­stal­la­tion of the FOE and Hutch for three line sta­tions is cur­rently un­der­way.  
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