vacuum chamber
| structure | Cast brass, nickel plated for easy cleaning. |
| Sample size | AriaandDuo(dual channel):51 mm (2.030inches)Mega(Large):106 mm (4.18inches) |
| sample to detector
spacing | 44 mm, with4 mmincrementally. |
| Detector size | AriaandDuo(dual channel):1200 mm2。Mega(Large):3000 mm2. (Consult manufacturer) |
| Detector Connector Type | back sideMicrodot（ORTEC Bmounting base). |
| Vacuum manifold connector | Aria、Duo(dual channel) andMega(Large):0.25in. Swagelok tube fittings.Ensemble(combination):NW25。 |
| Vacuum pump requirements | Rotary vacuum pump, displacement6.7 CFM（190 L/min), with oil mist collector. available for this applicationORTEC ALPHA-PPS-115(or-230）。 |
System performance
Based on when used in conjunction with the BU-017-450-100 ULTRA™ Series detector with a premium 241Am point source.
| energy resolution | ≤20 keV（FWHM), where the detector-to-source distance is equal to the detector diameter. |
| Detector efficiency | Achievable with smaller detector to source spacing ≥25％。 |
| Background | Based onBU-020-450-ASdetector, over3 MeV，≤1count/hours. |
electronic equipment
Bias power supply
| range | 0±100 V，10μA;The voltage value can be read by the computer. |
| bias voltage | Controlled by computer, it can be1 VAdjust for increments. |
| Pos/Neg | Can be usedPWBA slide switch (factory set for positive bias voltage) selects polarity. |
| enable/Disable | Controlled by computer. |
| indicator light | Front panel red for each channelLEDShows whether bias is on. |
Calibrate pulse generator
| range | 0to10 MeV。 |
| pulse generator | Computer passes12bit(2.5 keV) Level setting controls the internal pulse generator amplitude; factory set to nominal7 MeVpulse. |
| | |
| Frequency | 100 Hz。 |
| frequency stability | ≤±50 ppm/°C。 |
| Amplitude drift | ≤±150 ppm/°C。 |
| long term drift | At constant temperature ≤ ± of full scale0.005％/24hours. |
| open/close | Controlled by computer. |
| indicator light | When the pulse generator is on, the front panelBIAS(bias) redLEDFlashing. |
Detector Current Monitor
| range | 0Arrive10,000 nA; Reading by computer. |
| display resolution | 3 nA。 |
| preamplifier |
| charge sensitive | The nominal value is10 mV/MeV。 |
| Pos/Neg | Can be usedPWBSlide switch selects polarity. |
| numbersMCA |
| digital filter | 1 μsUnipolar equivalent. |
| conversion gain | Software optional256、512、1024、2048or4096, each segment is independent of each other. |
| Fine-tune gain | The software optional range is0.25Arrive1。 |
| digital offset | The software optional range is0to the conversion gain setting (4096), the increment is1channel. |
| show channel | The software optional range is0to (conversion gain - digital offset). |
| digital spectrum stabilizer | Controlled by computer. |
| Dead time correction | According toGedcke-HaleMethod for extended live time correction. |
| Software control |
| ADC LLD | The computer can be accessed from0Arrive100% of full scale for control. |
| ADC ULD | The computer can be accessed from0Arrive100% of full scale for control. |
|
Indicator lights (front panel)
|
| ADCbusy | Each time a digitized pulse occurs, redLEDwill flash once. |
|
Default
|
| real time/live time | 20Multiple of milliseconds. |
| area of interest | Peak count/Points counting. |
| Data overflow | When any channel exceeds231–1The collection is terminated. |
|
interface connector
|
| high speedUSB | Rear panel standard"B"TypeUSBinterface. |
computer configuration
| Computer with any of the following operating systems:Windows 7andWindows 10; 32bit or64Bit. |
Alpha Aria
oneNIMSingle alpha spectrum channel in the chassis. Each unit includes a variable detector bias supply (switchable positive or negative), a preamplifier and a test pulse generator with variable amplitude. | Vacuum control | front panel3Bit pumping/Exhaust/Hold valve. |
| Backlash protection (RCAP) option | No built-in pressure controller. needRCAP-2-120VorRCAP-2-240V。 |
| electrical and mechanical |
| Size | in double wideNIMin the chassis2.7inches wide x 11.9inches deep x 8.7inches high. |
| weight | Net weight 1.9Kilogram (4.2pounds).Shipping weight 2.3Kilogram (7.3pounds). |
| Power input | NIMpower supply.+6 V @ 315 mA, +12 V @ 50 mA, –12 V @ 75 mA, +24 V @ 50 mA。 |
| Power consumption | 5 WInput power. |
| operating environment | 0° to50°C. Gundam95% relative humidity, no condensation. |
Alpha Duo(dual channel)
Desktop dual alpha spectrometer with two alpha spectral channels. Each unit includes a vacuum gauge, variable detector bias supply (switchable positive or negative), preamplifier, test pulse generator with variable amplitude, and leakage current monitor.
| Vacuum control | Computer controlled eachAlpha Duomodule. |
| Vacuum measuring range | 200Hao Tuozhi20Tor, read by computer. |
| Backlash protection (RCAP) option | Pressure controller is built in, just add the optional bias sample holder. |
| RCAPcontroller scope | 1Entrust to13Tor, read by computer. Adjust target pressure ±10％。 |
| electrical and mechanical |
| Size | 10.1inches wide x 14.4inches deep x 6.0inch high case. |
| weight | Net weight 7.5Kilogram (16.8pounds). Shipping weight 11.5Kilogram (25.0pounds). |
| Power input | 120/240 V ac, 50/60 Hz。 |
| Power consumption | 10 WInput power. |
| operating environment | 0° to50°C. Gundam95% relative humidity, no condensation. |
Alpha Mega(Large)
Desktop large single alpha spectrometer. Includes vacuum gauge, variable detector bias supply (switchable positive or negative), preamplifier, test pulse generator with variable amplitude and leakage current monitor.
| Vacuum control | via computer. |
| Vacuum measuring range | 200Hao Tuozhi20Tor, read by computer. |
| Backlash protection (RCAP) option | No built-in pressure controller. needRCAP-2-120VorRCAP-2-240V。 |
| electrical and mechanical |
| Size | 10.1inches wide x 14.4inches deep x 6.0inch high case. |
| weight | Net weight 8.5Kilogram (18.7pounds). Shipping weight 11.5Kilogram (25.0pounds). |
| Power input | 120/240 V ac, 50/60 Hz。 |
| Power consumption | 10 WInput power. |
| operating environment | 0° to50°C. Gundam95% relative humidity, no condensation. |
Alpha Ensemble(combination)
Modular alpha spectroscopy system configurable with up to4modules,ALPHA-DUO-M1and/orALPHA-MEGA-M1Extension modules can be combined in any way. Each alpha spectroscopy module includes a vacuum gauge, variable detector bias supply (switchable positive or negative), preamplifier, test pulse generator with variable amplitude, automatic controlRCAPand leakage current monitors. Each extension module isAlpha EnsembleThere is a separate vacuum control in both (combination) configurations.
Alpha Ensemble(combination) can be rack mounted or placed in the included desktop enclosure.
Each instrument comes with a complete set of blank panels to cover unoccupied expansion space.
| Vacuum control | Each installed module is controlled from a computer. |
| Vacuum measuring range | 200Hao Tuozhi20Tor, read by computer. |
| Backlash protection (RCAP) option | Built-in pressure controller. Requires the addition of optional bias sample holder. Only available withALPHA-DUO-M1Modules are used together. |
| RCAPcontroller scope | 1Entrust to13Tor, read by computer. Adjust target pressure ±10％。 |
| electrical and mechanical |
| Size | 19.0inches wide x 19.4inches deep x 10.7inch high housing |
| weight | Net weight (with4extension modules):26.6Kilogram (58.4pounds).Shipping weight (with4extension modules):29.5Kilogram (65.0pounds) |
| Power input | 120/240 V ac, 50/60 Hz。 |
| Power consumption | 50 WInput power. |
| operating environment | 0° to50°C. Gundam95% relative humidity, no condensation. |
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