crystal detector 中文意思是什麼
crystal detector
解釋
晶體檢波器。-
The crystal detector was soon replaced by the thermionic value and had largely become obsolete by 1939.
晶體檢波器不久即被熱電子管所代替，到1939年已大部分變成了廢物。 -
The cooling and heat preservation of bgo glitter crystal detector
復合材料纏繞壓力容器的失效風險分析 -
Crystal detector tester
晶體檢波器試驗器 -
Based the eag - i etchant, a new etchant was developed, with which the etch pit pattern on ( 110 ), ( 111 ) and ( 100 ) faces of czt crystals can emerge immediately and effectually. this pager investigated relation between the ( 110 ) faces of cutting from crystals conveniently and accurately by laser reflex method. by the surface treatment, the nuclear radiation detector was fabricated with ( 110 ) of czt crystal and strong 241am responsibility was observed
在改變e _ （ ag ）腐蝕液的配方的基礎上，研製了新的腐蝕液，可方便、快速、有效的顯示czt不同晶面的缺陷蝕坑形貌;研究了利用激光正反射法和自然解理的不同（ 110 ）面之間的關系，方便、快速、準確的進行定向切割晶體的方法;採用生長的czt單晶體自然解理的（ 110 ）面，經過表面處理，試制了探測器元件，對24lam有較強的響應。 -
The pll consists of a crystal oscillator, a ring voltage - control - oscillator, a frequency divider, a phase / frequency detector, a charge pump and a loop filter
設計的電路包括20mhz晶體振蕩器，鑒頻鑒相器，壓控振蕩器，固定分頻器，電荷泵和低通濾波器。 -
Quality control of nuclear medicine instruments - part 2 : constancy testing of single crystal gamma - camers used in planar scintigraphy and in anger type gamma cameras with rotating detector heads used in single photon emission tomography
核醫療儀器的質量控制.第2部分:用於單光子x線斷層術 -
Specification for indium antimonide single crystal slices for use in infrared detector
紅外探測器用銻化銦單晶片規范 -
Then we turned in the input laser to observe the decline of phase conjugate reflectivity. measuring dark storage time, we found that the phase conjugate reflectivity declined to 50 % of steady - state value when photorefractive crystal was in dark condition for 30 minutes. even after 9 hours, there still existed remaining reflectivity, which could n ' t be measured by our detector
因而研究了晶體內位相共軛光柵存儲特性，即觀察位相共軛光柵形成后在黑暗條件下能存儲的時間，實驗結果得出位相共軛光柵在黑暗中30分鐘后，位相共軛反射率下降到原來的50 ，而在黑暗中9小時后，位相共軛光非常微弱，無法測出。 -
For the purposes to make cd1 - xznxte detector, ohmic contact materials of cd1 - xznxte crystal are selected and structure of electrode is designed. the processing of conducting film prepared by the magnetron sputtering is studied
本研究主要開展了在cdznte晶體上歐姆接觸電極的設計選材和磁控濺射方法制備導電薄膜的工藝研究，為cdznte探測器的制備奠定工藝技術基礎。 -
One of the most key technologies of preparing cd1 - xznxte detector is to make ohmic contact film electrode on cd1 - xznxte crystal ' s surface, and the main technology usually used is evaporation, but the cohesion of evaporated film is n ' t very firm
制備cdznte探測器最關鍵的技術之一就是在cdznte表面制備出歐姆接觸薄膜電極。關于在cd _ （ 1 - x ） zn _ xte晶體表面制備接觸電極用導電薄膜，大都是採用蒸發鍍膜技術，膜層與cdznte晶體結合不很牢固。 -
The signal generator of sweep frequency is based on dds device ad9954, the signal measuring circuit is based on gain and phase detector ad8302, the real - time control and deal circuit is based on tms320vc5409, and the periphery interface circuit is based on at89s52. the system can generate sweep frequency signal with the frequency range from 100khz to 150mhz, and with the power range from - 45dbm to + 18dbm. it can measure the gain and phase of the network, display the measure data by liquid crystal displayed and print it by the printer
該測試儀以dds晶元ad9954為核心構成掃頻信號源電路，以增益相位檢測器ad8302為核心構成檢測電路，以dsp晶元tms320vc5409為核心構成控制與運算電路，以及以at89s52為核心構成外圍介面電路。該測試儀能產生頻率范圍達100k ~ 100mhz ，功率范圍為- 45dbm ~ + 18dbm的掃頻信號，能對被測網路的頻率特性進行測量，並留有豐富的外圍介面，可以將測量數據繪圖通過lcd顯示或者由印表機列印輸出。 -
In the paper, the design of the real - time test system for crystal parameters is presented. the signal generator of sweep frequency based on dds device ad9852, the signal measuring circuit based on gain and phase detector ad8302, and the real - time control and deal circuit based on tms320vc5416 and the design of high - speed printed digital & analog circuit board are discussed in details
本文闡述了晶振實時測量系統的設計，介紹了以dds晶元ad9852為核心的掃頻信號源電路，以增益相位檢測器ad8302為核心的信號檢測電路，以dsp晶元tms320vc5416為核心的實時控制與運算電路，以及高速數模混合電路板的設計方法。 -
In order to find out an optimized method for constructing the y - rays detector, a simulation study for light collecting efficiency of scintillation crystal bgo is carried out by means of monte carlo method
為了找到構築閃爍晶體探測器的優化方法，我們使用蒙特卡羅方法對閃爍晶體bgo的光收集效率進行了模擬研究。 -
Cd1 - xznxte single crystal with good crystallinity has been grown by the descending ampoule with rotation method - before this, high - purity cd1 - xznxte polycrystal materials have been synthesized from 6n gd zn te in the same ampoule. on the basis of this, we deeply explore method of detector fabrication. and we also studied the level and density of traps in detector. gold, indium and c have been deposited as electrodes on polished and chemically etched surfaces of samples with the sizes from 5 5 1 to 10 10 1. 5mm to compare different contact technologies. the behavior of detector ' s leakage current with temperature and leakage current with time were studied as well as th current - voltage characteristics to deduce the level and density of trap in detectors
我們利用熔體溫度振蕩法在石英安瓿中將6n的單質cd 、 zn 、 te合成多晶原料，用坩鍋旋轉下降法在同一安瓿中生長出尺寸為20 40mm的cd _ （ 1 - x ） zn _ xte晶體。在此基礎上對碲鋅鎘探測器的工藝進行了較深入的研究，製作了厚1 ? 1 . 5mm的探測器，測試了c 、 in 、 au等不同金屬的電極接觸性能，並在國內首次通過測試器件的i ? v 、 i ? t曲線、弛豫特性和電容特性對電阻率、陷阱能級、陷阱濃度進行了分析，同時測得的~ （ 241 ） am源的能譜。 -
The research of positron imaging systems can be divided into two parts : imaging instrumentation and image reconstruction, which are the main interest of this thesis. the bgo ( bismuth germanate ) scintillation crystal coupled with a position sensitive photomultiplier tube ( ps - pmt ) h7546 are used to build the y - rays detector
我們設計了以閃爍晶體作為成像前端，與多陽極位置靈敏型光電倍增管相耦合的射線探測器，具體為bgo （ bi _ 4ge _ 3o _ （ 12 ） ，鍺酸鉍）晶體、 hamamastu的h7546光電倍增管。 -
It is not only the satisfactory substrate used for the epitaxy growth of infrared detector material hgcdte, but also attractive candidates for the manufacture of high quality x - ray or y - ray detectors, photoelectronic modulator, solar cell, and laser windows etc. no matter what the crystal is used as detectors or epitaxy substrate, it is of vital importanteto obtain high quality cdznte crystals with perfect surface
它不僅是生長紅外探測器材料hgcdte最理想的外延襯底，而且還被廣泛用於制備高性能x射線或射線探測器、光電調制器、太陽能電池和激光窗口等。獲得高性能、高質量的czt晶體是至關重要的。無論是作探測器還是作外延襯底等都要求它的表面質量要非常高，因為表面質量會直接影響到器件的性能。 -
To ensure optimal conditions, the detector contains a heating device, a magnetic stirrer, and a small refrigeration device. all of these devices are controlled by programmable controller. liquid crystal touch screen communicated with programmable controller, provides a friendly man - machine interface, which make the operation more simple and convenient
為確保酶電極的最佳工作條件，系統由加熱、磁力攪拌、製冷等裝置組成，在可編程式控制制器的控制下完成檢測工作，並配以液晶觸摸屏，提供良好的人機界面，使操作更加簡單方便。
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