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TUPYP034 |
A New Design of X-ray White Beam Profile Monitor for HEPS Beamlines | |
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| 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 | |
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| 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 |
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| 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. | ||
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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 |
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| 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. | ||
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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 | |
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| 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 | |
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| 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 | |
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| 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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