超高性能矽漂移探測器
FAST SDD® Ultra High Performance Silicon Drift Detector
【AMPTEK】矽漂移偵測器/X-ray,Gamma-ray偵測器 用於 XRF/EDS 的 FastSDD X 射線探測器
簡介
FAST SDD
這是真正的尖端技術!
Amptek 最近在內部引入了矽晶片製造工藝並改進了此工藝。 他們生產出的探測器具有更低的雜訊、更低的洩漏電流、更好的電荷收集能力,並且探測器之間的一致性更好。 這使它成為目前性能最佳且真正尖端的矽漂移探測器。
產品概述
傳統的 SDD 在密封的 TO-8 封裝內使用了一個接面場效電晶體(JFET)以及一個外部前置放大器,而 FAST SDD 在 TO-8 封裝內使用了一個互補式金屬氧化物半導體(CMOS)前置放大器,並用金屬氧化物半導體場效電晶體(MOSFET)取代了 JFET。 這顯著降低了電容,提供了更低的串聯雜訊,並提高了短峰值時間時的解析度。 FAST SDD® 使用了相同的探測器,但帶有前置放大器,可在較短的峰值時間時提供更低的雜訊。 改善後的(更低)解析度可分離具有相近能量值以及峰可能重疊的螢光 X 射線,從而使用戶能夠更好地識別樣品中的所有元素。 較短的峰值時間也可顯著提高計數率; 更多計數可提供更好的統計數據。
產品特點
真正的尖端技術
應用
該圖顯示了太空站上 NICER X 射線定時儀器的 96 個 Amptek FAST SDD®,其中 C2 視窗在安裝遮光罩之前
安裝在焦平面上。 鳴謝: NASA/Keith Gendreau
常規 |
|
探測器類型 |
帶 CMOS 前置放大器的矽漂移探測器(SDD) |
探測器尺寸 |
25 mm2 - 準直至 17 mm2 |
矽厚度 |
500 µm |
准直器 |
內部多層準直器(ML) |
能量解析度 @ 5.9 keV(55Fe) |
4 μs 峰值時間時為 122 - 129 eV FWHM(保證) |
峰背比 |
20,000:1(5.9 keV 至 1 keV 的計數比)(典型值) |
探測器視窗選項 |
鈹(Be):0.5 密耳(12.5 μm)或 0.3 密耳(8 μm) |
電荷靈敏前置放大器 |
CMOS |
增益穩定性 |
<20 ppm/°C(典型值) |
尺寸 |
探測器模組:TO-8 封裝(0.640 英寸高,包括接腳,0.600 英寸直徑) |
重量 |
探測器模組:0.14 oz(4.1 g) |
總功率 |
<2 W |
保固 |
1 年 |
典型設備壽命 |
5 至 10 年,視使用方式而定 |
工作條件 |
-35°C至 +80°C |
儲存和運輸 |
長期存儲:10年以上保持環境乾燥 |
|
TUV 認證 |
輸入 |
|
前置放大器電源 |
XR100 配置:±8 V @ 15 mA,峰間雜訊不超過 50 mV |
探測器電源 |
+100 至 +180 V @ 25 μA 非常穩定,變化 <0.1% |
致冷器電源 |
電流 = 最大 450 mA,電壓 = 最大 3.5 V,峰間雜訊 <100 mV |
輸出 |
|
前置放大器靈敏度 |
典型 3.6 mV/keV(可能因不同探測器而異) |
前置放大器極性 |
正信號輸出(最大負載為 1 kohm) |
前置放大器反饋 |
重置 |
溫度監測靈敏度 |
因配置而異 |
前置放大器輸出上升時間 |
<35 ns |
Overview
Unlike our conventional SDDs which use a junction gate field-effect transistor (JFET) inside the hermetically sealed TO-8 package, along with an external preamplifier, the FAST SDD uses a complementary metal-oxide-semiconductor (CMOS) preamplifier inside the TO-8 package, and replaces the JFET with a metal-oxide-semiconductor field-effect transistor (MOSFET). This significantly reduces capacitance, providing much lower series noise and yielding improved resolution at very short peaking times. The FAST SDD® uses the same detector but with a preamplifier giving lower noise at short peaking times. Improved (lower) resolution enables isolation/separation of fluorescent X-rays with close energy values where peaks would otherwise overlap, permitting users better identification all of the elements in their sample(s). Short peaking times also yield significant improvements in count rates; more counts provide better statistics.
Features
The True State-Of-The-Art
Applications
A view of the NICER X-ray Timing Instrument on the Space Station showing 96 Amptek FAST SDDs® with C2 windows mounted on the focal plane, before light shield assembly. Credits: NASA/Keith Gendreau
General | |
Detector Type | Silicon Drift Detector (SDD) with CMOS preamplifier |
Detector Size | 25 mm2 - collimated to 17 mm2 Also available 70mm2 - collimated to 50 mm2 |
Silicon Thickness | 500 µm or 1000um available |
Collimator | Internal MultiLayer Collimator (ML) |
Energy Resolution @ 5.9 keV (55Fe) | 122 - 129 eV FWHM at 4 µs peaking time (guaranteed) |
Peak to Background | 20,000:1 (ratio of counts from 5.9 keV to 1 keV) (typical) |
Detector Window Options | Beryllium (Be): 0.5 mil (12.5 µm) or 0.3 mil (8 µm) |
Charge Sensitive Preamplifier | CMOS |
Gain Stability | <20 ppm/°C (typical) |
Size (see Configurations) |
Detector module: TO-8 package (0.640 in. high including pins, 0.600 in. diameter) XR100 box: 3.00 x 1.75 x 1.13 in (7.6 x 4.4 x 2.9 cm) excluding extender X-123 box: 2.7 x 3.9 x 1 in (7 x 10 x 2.5 cm ) excluding extender OEM configurations vary |
Weight (see Configurations) |
Detector module: 0.14 oz (4.1 g) XR100 box: 4.4 ounces (125 g) X-123 box: 6.3 oz (180 g) OEM configurations vary |
Total Power | <2 Watt |
Warranty Period | 1 Year |
Typical Device Lifetime | 5 to 10 years, depending on use |
Operation conditions | -35°C to +80°C |
Storage and Shipping | Long term storage: 10+ years in dry environment Typical Storage and Shipping: -40°C to +85°C, 10 to 90% humidity non condensing |
TUV Certification Certificate #: CU 72072412 02 Tested to: UL 61010-1: 2004 R7 .05 CAN/CSA-C22.2 61010-1: 2004 |
|
Inputs | |
Preamp Power | XR100 configuration: ±8 V @ 15 mA with no more than 50 mV peak-to-peak noise X123 or OEM configuration (PA210/230 or X-123): ±5 V |
Detector Power | -100 to -180 V @ 25 µA very stable <0.1% variation |
Cooler Power | Current = 450 mA maximum, voltage = 3.5 V maximum with <100 mV peak-to-peak noise Note: the XR-100 can include its own internal temperature controller |
Outputs | |
Preamplifier Sensitivity | 3.6 mV/keV typical (may vary for different detectors) |
Preamplifier Polarity | Positive signal output (1 kohm maximum load) |
Preamplifier Feedback | Reset |
Temperature Monitor Sensitivity | Varies with configuration When used with PX5, DP5, or X-123: direct reading in Kelvin through software. |
Preamplifier Output Rise Time | <35 ns for 25mm2, <60 ns for 70mm2 |