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	A facility for direct measurements for nuclear astrophysics at IFIN-HH - a 3 MV tandem accelerator and an ultra-low background laboratory 期刊论文 OAI收割 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2020, 卷号: 953, 页码: 6 作者: Tudor, D.; Trache, L.; Chilug, A., I; Stefanescu, I. C.; Spiridon, A. \| 收藏 \| 浏览/下载：23/0 \| 提交时间：2022/01/19 Nuclear physics for astrophysics Direct measurements Thick target method Activation methods Ultra-low background
	Efficient entanglement purification in quantum repeaters 期刊论文 OAI收割 CHINESE PHYSICS B, 2012, 卷号: 21, 期号: 3 Sheng, YB; Zhou, L; Cheng, WW; Gong, LY; Zhao, SM; Zheng, BY 收藏 \| 浏览/下载：36/0 \| 提交时间：2013/09/17 SECURE DIRECT COMMUNICATION BELL-STATE MEASUREMENTS M-QUBIT STATE NOISY CHANNELS ATOMIC ENSEMBLES LINEAR OPTICS EPR PAIRS TELEPORTATION CRYPTOGRAPHY SECRET
	Fabrication of high-efficiency ultraviolet blazed gratings by use of direct Ar2-CHF3 ion-beam etching through a rectangular photoresist mask (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China Tan X. 收藏 \| 浏览/下载：25/0 \| 提交时间：2013/03/25 In ultraviolet spectroscopy groove irregularity and surface roughness of nanometer magnitude can cause a significant loss of diffraction efficiency. Therefore there is a constant need to improve the diffraction efficiency. A blazed grating can concentrate most of the light intensity into a desired diffraction order it is important to control the groove shape precisely so it is the optimum choice among gratings of different kinds of profile. As the operating wavelength of most UV spectral applications is less than 200 nm especially the blaze angle and the apical angle. We have presented a direct shaping method to fabricate EUV blazed gratings by using an ion-beam mixture of Ar+ and CHF2 +to etch K9 glass with a rectangular photoresist mask. With this method the required blaze angle is small we have succeeded in fabricating well-shaped UV blazed gratings with a 1200 line/mm groove density and 8.54 blaze angles and 1200 line/mm groove density and 11.68 blaze angles and the metrical efficiency is about 81% and 78%. The good performance of the gratings was verified by diffraction efficiency measurements. When one uses the etching model the conditions on the ion-beam grazing incident angle and the CHF3partial pressure should be noted. Besides since the etched groove shape depends on the aspect ratio of the photoresist mask ridge if we wish to fabricate larger gratings with this method we must improve the uniformity of the photoresist mask before ion-beam etching. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
	Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者: Yang L.; Zhang J.; Zhang J.; Zhang J.; Wang J. 收藏 \| 浏览/下载：28/0 \| 提交时间：2013/03/25 A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.
	A tunable diode-laser absorption spectroscopy (TDLAS) thermometry for combustion diagnostics 会议论文 OAI收割 15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Dayton, OH, United states, April 28, 2008 - May 1, 2008 作者: Yu XL(余西龙); Li F(李飞); Chen LH(陈立红); Chang XY(张新宇) 收藏 \| 浏览/下载：37/0 \| 提交时间：2017/06/01 Absorption lines Combustion diagnostics Direct absorption Fiber-coupled Flat flame burner High sensitivity Near Infrared Non-intrusive Premixed Scan rates Thermocouple measurements Tunable diode laser absorption spectroscopy Tunable diode lasers Water vapor concentration Water-vapor absorption
	Mechanisms of energy transfer in Pr3+ and Cr3+ codoped SrAl12O19 phosphor (EI CONFERENCE) 会议论文 OAI收割 209th ECS Meeting, May 7, 2006 - May 12, 2006, Denver, CO, United states 作者: Zhang J.; Wang X.-J.; Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 A two-step energy transfer was observed in Pr3+ and Cr 3+ codoped SrAl12O19 phosphor which results in a two-photon luminescence for one UV/vacuum-UV photon absorbed. For one Pr 3+ ion excited to the lowest 4f5d states two Cr3+ ions may be excited and emit two red photons due to 2E- 4A2 transitions of the Cr3+ ions Cr 3+ ions can be excited into the 4T1(F) levels by cross relaxation of Pr3+ 1S0- 1I6 or by direct energy transfer from Pr3+ 3P0 1 states. The mechanisms of the two-step energy transfer process were studied based on spectra and lifetime measurements. copyright The Electrochemical Society.