巨永林
1. 小型低温制冷机研制及其在冷却低温电子学器件中的应用研究;2. 液化天然气(LNG)技术及其冷能综合利用中的关键技术研究;3. 新型低温电子泡粒子探测器研制中所涉及的低温传热与流动问题。
个性化签名
- 姓名:巨永林
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
制冷与低温工程
- 研究兴趣:1. 小型低温制冷机研制及其在冷却低温电子学器件中的应用研究;2. 液化天然气(LNG)技术及其冷能综合利用中的关键技术研究;3. 新型低温电子泡粒子探测器研制中所涉及的低温传热与流动问题。
巨永林,男,1970年6月生,博士,教授,博士生导师。1992和1995年在西安交通大学获得学士和硕士学位,1998年在中国科学院力学研究所获得博士学位。1998-2000年在荷兰Eindhoven大学物理系做博士后,2000-2002年任中国科学院理化技术研究所副研究员,期间曾在美国能源部布鲁克海文国家实验室(BNL)做高级访问学者,2002-2005年任美国哥伦比亚大学物理系Nevis实验室副研究员,主要从事与低温物理和粒子物理有关的低温科研工作。2005年10月起任上海交通大学教授、博士生导师。
长期从事低温工程和低温物理方面的研究工作,在小型低温制冷机研究、新型低温制冷技术、低温探测器等方面做出了创造性的突出贡献,取得国内外同行公认的重要科研成就。已发表学术论文100余篇,其中SCI/EI收录50余篇,ISTP收录30余篇,所发表论文被多次引用。作为第一发明人获得中国发明专利10项。曾于1998年获得中国科学院发明二等奖1项, 1999年获得国家技术发明三等奖1项,2003年获得国际制冷学会Carl von Linde Award(林徳奖),2006年入选上海市浦江人才计划,2007年入选教育部新世纪优秀人材计划,2008年获得上海交通大学SMC优秀青年教师奖,2007年和2009年2次获得上海市白玉兰科技人才基金。
现为上海交通大学制冷与低温工程研究所—低温制冷与液化课题组负责人,哈尔滨工业大学兼职教授,中国制冷学会高级会员、低温专业委员会委员,上海市制冷学会常务理事、第一专业委员会(低温工程)主任,新奥集团-上海交通大学清洁能源研究中心理事、科技部国际科技合作计划评价专家、国家自然科学基金评审专家、上海市科协决策咨询专家、Frontiers of Energy and Power Engineering in China(中国能源与动力工程前沿)学术期刊编委。目前主持国家科技部863课题、国防科技工业民用专项、上海市科委浦江计划、国际合作及企业委托课题10余项。
主要研究领域:1. 小型低温制冷机研制及其在冷却低温电子学器件中的应用研究;2. 液化天然气(LNG)技术及其冷能综合利用中的关键技术研究;3. 新型低温电子泡粒子探测器研制中所涉及的低温传热与流动问题。
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12
巨永林, Yonglin JU, Qingqing SHEN
Front. Energy Power Eng. China 2009, 3 (1): 80-84,-0001,():
-1年11月30日
A brief review is presented on previous experimental results and correlations on the friction factor of cryocooler regenerators operating at oscillating flow and pulsating pressure conditions, for different mesh sizes of packed woven screens, focusing on the effects of different operating frequencies ranging from 20 to 80 Hz, at room and cryogenic temperatures. A comparison of the friction factor data with those of other studies is presented to clarify the reason for the difference. Finally, a new oscillating flow correlation of regenerators, in terms of several nondimensional parameters, is discussed and compared.
friction factor, regenerator, oscillating flow, high frequency 1 Introduction
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巨永林, Y.L. Ju a, b, *, J. Dodd b, R. Galea b, M. Leltchouk b, W. Willis b, L.X. Jia c, P. Rehak c, V. Tcherniatine c
Cryogenics 47 (2007) 81-88,-0001,():
-1年11月30日
We are developing a new cryogenic neutrino detector: electron bubble chamber, using liquid helium as the detecting medium, for the detection of low energy p-p reaction neutrinos (<420 keV), from the Sun. The program focuses in particular on the interactions of neutrinos scattering off atomic electrons in the detecting medium of liquid helium, resulting in recoil electrons which can be measured. We designed and constructed a small test chamber with 1.5 L active volume to start the detector R&D, and performed experimental proofs of the operation principle. The test chamber is a stainless steel cylinder equipped with five optical windows and ten high voltage cables. To shield the liquid helium chamber against the external heat loads, the chamber is made of double-walled jacket cooled by a pumped helium bath and is built into a LN2/LHe cryostat, equipped with 80 K and 4 K radiation shields. A needle valve for vapor helium cooling was used to provide a 1.7-4.5 K low temperature environments. The cryogenic test chamber has been successfully operated to test the performance of Gas Electron Multipliers (GEMs) in He and He+H2 at temperatures in the range of 3-293 K. This paper will give an introduction on the cryogenic solar neutrino detector using electron bubbles in liquid helium, then present the cryogenic design and operation of liquid helium in the small test chamber. The general principles of a full-scale electron bubble detector for the detection of low energy solar neutrinos are also proposed.
Liquid helium (, B), , Cryostat (, F), , Instrumentation (, D), , Electron bubble chamber (, F),
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【期刊论文】Detection of low energy solar neutrinos by a two-phase cryogenic e-bubble detector
巨永林, JU YongLin, †, GU Yan, J. DODD, R. GALEA, M. LELTCHOUK, W. WILLIS, P. REHAK & V.TCHERNIATINE
Chinese Science Bulletin November 2007 vol.52 no.21 3011-3015,-0001,():
-1年11月30日
A new two-phase cryogenic neutrino detector using electron bubble (e-bubble) specifically in liquid helium is proposed and being developed for real time, high rate measurements of low-energy p-p reaction neutrinos from the sun. The e-bubble detector is a time projection chamber-like (TPC) tracking detector. The task of such a neutrino detector is to detect the ionization of the elastically scattered target electrons by incident neutrinos, and then to characterize their energy and direction and to distinguish them from radioactive backgrounds. The ionization signals are expected to be small and hence undergo avalanche amplification in the saturated vapor above the liquid phase by gas electron multipliers (GEMs) at high gain. Higher granularity and intrinsically suppressed ion feedback give a good spatial resolution and are the major advantages of this technology. It should be possible to construct such a detector to track charged particles down to 100-200 keV in a massive liquid helium target with fractional millimeter spatial resolution in three-dimensional space, using the GEM-based TPC with a high-resolution CCD camera, for both the electronic and light readout.
cryogenic detector, solar neutrinos, electron bubble
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【期刊论文】On the performance of copper foaming metal in the heat exchangers of pulse tube refrigerator
巨永林, K. Wang *, Y.L. Ju, X.S. Lu, A.Z. Gu
Cryogenics 47 (2007) 19-24,-0001,():
-1年11月30日
As key components in pulse tube refrigerators (PTRs), heat exchangers have great influence on the performance of the PTRs, especially the cold end heat exchangers which dominate the cooling effect between the cold gas and heat load. Filling copper screens are widely used to improve the performance of heat exchange and laminar flow. Whereas, the heat transfer rate of copper screens is still not good enough for the actual requirements of PTRs. Furthermore, the flow resistance of the copper screen is growing up quickly with the increase of screen mesh. In this paper, we propose a new type of copper foaming metal with high heat transfer area and low flow resistance in the heat exchanger instead of the copper screens. The heat transfer performances of the copper screens and the copper foaming metal are firstly compared by theoretical calculation, which shows that the performance of the copper foaming metal with 600 lm pore size is better than that of 20 and 80 mesh copper screens, verified by experimental results. A four valve pulse tube refrigerator (FVPTR) with copper foaming metal of 600 lm pore size as filling material of the heat exchanger achieved 69.5 K, 2.5K lower than that of using 20 mesh copper screens, 1.7K lower than that of using 80 mesh copper screens.
Four valve pulse tube refrigerator, Heat exchanger, Copper foaming metal
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【期刊论文】Gas Purity Effect on GEM Performance in He and Ne at Low Temperatures
巨永林, R. Galea, J. Dodd, Y. Ju, M. Leltchouk, W. Willis, P. Rehak, V. Tcherniatine, A. Buzulutskov, and D. Pavlyuchenko
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL.53, NO.4, AUGUST 2006,-0001,():
-1年11月30日
The performance of Gas Electron Multipliers (GEMs) in gaseous He, Ne, He+H2 and Ne+H2 was studied at temperatures in the range of 3-293K. This paper reports on previously published measurements and additional studies on the effects of the purity of the gases in which the GEM performance is evaluated. In He, at temperatures between 77 and 293 K, triple-GEM structures operate at rather high gains, exceeding 1000. There is an indication that this high gain is achieved through the Penning effect as a result of impurities in the gas. At lower temperatures the gainvoltage characteristics are significantly modified probably due to the freeze-out of these impurities. Double-GEM and single-GEM structures can operate down to 3K at gains reaching only several tens at a gas density of about 0.5g/l; at higher densities the maximum gain drops further. In Ne, the maximum gain also drops at cryogenic temperatures. The gain drop in Ne at low temperatures can be re-established in Penning mixtures of Ne+H2: very high gains, exceeding 104, have been obtained in these mixtures at 30-77K, at a density of 9.2g/l which corresponds to saturated Ne vapor density at 27K. The addition of small amounts of H2 in He also re-establishes large GEM gains above 30K but no gain was observed in He+H2 at 4K and a density of 1.7g/l (corresponding to roughly one-tenth of the saturated vapor density). These studies are, in part, being pursued in the development of two-phase He and Ne detectors for solar neutrino detection.
Cryogenic noble gases, electron bubble, gas electron multiplier, helium, neon, Penning mixtures
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【期刊论文】GEM operation in helium and neon at low temperatures
巨永林, A. Buzulutskov a, *, J. Dodd b, R. Galea b, Y. Ju b, M. Leltchouk b, P. Rehak c, V. Tcherniatine c, W.J. Willis b, A. Bondar a, D. Pavlyuchenko a, R. Snopkov a, Y. Tikhonov a
Nuclear Instruments and Methods in Physics Research A 548 (2005) 487-498,-0001,():
-1年11月30日
We study the performance of Gas Electron Multipliers (GEMs) in gaseous He, Ne and Ne+H2 at temperatures in the range of 2.6-293K. In He, at temperatures between 62 and 293 K, the triple-GEM structures often operate at rather high gains, exceeding 1000. There is an indication that this high gain is achieved by the Penning effect in the gas impurities released by outgassing. At lower temperatures, the gain-voltage characteristics are significantly modified probably due to the freeze-out of impurities. In particular, the double-and single-GEM structures can operate down to 2.6K at gains reaching only several tens at a gas density of about 0.5g/l; at higher densities the maximum gain drops further. In Ne, the maximum gain also drops at cryogenic temperatures. The gain drop in Ne at low temperatures can be reestablished in Penning mixtures of Ne+H2: very high gains, exceeding 104, have been obtained in these mixtures at 50-60K, at a density of 9.2g/l corresponding to that of saturated Ne vapor near 27K. The results obtained are relevant in the fields of two-phase He and Ne detectors for solar neutrino detection and electron avalanching at low temperatures.
Gas electron multipliers, Cryogenic avalanche detectors, Helium, Neon, Penning mixtures
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巨永林, H.Z. Dang *, Y.L. Ju, J.T. Liang, J.H. Cai, M.G. Zhao, Y. Zhou
Cryogenics 45 (2005) 213-223,-0001,():
-1年11月30日
A set of Stirling-type non-magnetic and non-metallic co-axial pulse tube cryocoolers, intended to achieve portable cryogen-free systems with very low interference for high-Tc SQUIDs operation, have been designed and tested in TIPC/CAS. The key feature is that all cooler components in the vicinity of SQUIDs pick-up loops are made of non-magnetic and non-metallic materials, in order to eliminate complicated interference and realize direct couple with SQUIDs. The cooling options, cooler interference and corresponding solutions are reviewed briefly, and then we focus our attention on the cryogenic design and selection of the materials. Over 30 cooler samples have been fabricated and tested systematically. A typical cooling power of over 100mw at 80K with 70W input electrical power has been achieved. Detailed cooling performance and elementary interference characteristics of the coolers are also analyzed and evaluated.
Stirling-type, Nonmagnetic, Nonmetallic, Pulse tube cryocoolers, High-Tc SQUIDs
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巨永林, Y.L. Ju *, G.Q. He, Y.K. Hou, J.T. Liang, Y. Zhou
Cryogenics 43 (2003) 1-7,-0001,():
-1年11月30日
We measured the flow resistance and flow inductance of inertance tubes at high acoustic amplitudes for four different inner diameters of 0.6, 1.0, 1.5 and 2.0 mm at various tube length ranging from 100 to 1500 mm, at frequencies of 30, 40, 50, 60 and 70 Hz. The experiments were carried out under system mean pressure of 20 bar at room temperature. The experimental data were compared with the explicit solution to the linear momentum equation for small acoustic amplitudes and were fitted with the modification coefficients in terms of the operating frequency and Reynolds numbers characterized by the amplitude of gas velocities.
Experimental measurements, Oscillating flow, Inertance tube
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【期刊论文】On the numerical design of a new type of 4K GM/PT hybrid refrigerators
巨永林, Y.L. Ju a, *, L. Wang b
Cryogenics 42 (2002) 533-542,-0001,():
-1年11月30日
In this paper we developed and designed, based on theoretical considerations, a new type of 4 K GM/PT hybrid refrigerators. The upper warm stage of the hybrid refrigerator is a typical GM refrigeration cycle, and the cold stage is a pulse tube refrigerator (PTR), on which is thermodynamically coupled the upper warm stage. Four different types of phase shifting assembly: (1) a cold auxiliary piston that is connected to the displacer of the upper GM refrigerator stage, (2) an orifice with reservoir encircled the cold head of the upper stage, (3) an orifice with double-inlet, and (4) in combination with the cold auxiliary piston, orifice and double-inlet, has been proposed and analyzed for the adjustment of the phase shift between the gas mass flow and pressure in the pulse tube. Numerical simulation is performed to understand the unique thermo-physical features, to reveal the time-dependent dynamic parameters and to quantify the overall cooling performance of the hybrid refrigerator. We rely on a one-dimensional, unsteady compressible flow numerical model that is based on a mixed Eulerian–Lagrangian method developed by the present author. The model will be first applied to analyze the cooling performance of the hybrid refrigerator with different types of phase shifting assembly. In what following, it is used to simulate the dynamic parameters in the cold stage of the pulse tube cycle. Next, optimization of the structure parameters and geometrical configuration of the new refrigerator will be presented. Finally, the influences of different hybrid regenerative materials on the cooling capacity of the new hybrid GM/PTR will be also discussed.
GM/, PT hybrid refrigerator, Numerical study, Liquid helium temperature
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【期刊论文】Thermodynamic analysis of GM-type pulse tube coolers☆
巨永林, Y.l. Ju*,
Cryogenics 41 (2001) 513-520,-0001,():
-1年11月30日
The thermodynamic loss of rotary valve and the coefficient of performance (COP) of GM-type pulse tube coolers (VTCs) are discussed and explained by using the first and second laws 0f thermodynamics in this paper The COP 0f GM-type PTC,based on lwo types of pressure profiles the sinusoidal wave inside the pulse tube and the step wave at the compressor side has been derived and compared wim mat of Stirling-type PTC Result shows that additional compressor work is needed due to the irreversible entropy productions in the rotary valve thereby decreasing the COP of GM-type PTC The eriect of double—inlet mode on the COP of PTC has distinct improvement at lower temperature region (larger TH/TL). It is also shown that the COP of GM-type PTC is independent of the shape of the pressure profiles in the ideal case of no flow resistance in the regenerator.
Pulse tube cooler, GM-type, Thermodynamic analysis
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