MCA2100R / MCA2100REN Description (January 2005)

Quantum™ Software Features

  • Library-driven nuclide markers with readout in energy or channels
  • Log and linear vertical displays with auto-scale
  • Library for storing caibration standards information
  • ROI markers displayed after peak search is performed
  • Qscript-user-defined automation template

ADC

  • 3.5 µs successive approximation
  • 14-bit resolution
  • Discriminators (computer controlled)
    • Upper (105% full scale) in increments of 0.41%
    • Lower (0% full scale) in increments of 0.41%
  • Zero adjustment via computer in increments of 0.41%
  • Maximum throughput: 75,000 cps

Spectrum memory

  • QCC mode: 256 or 512 channels
  • Linear mode: 250, 500, or 1000 channels
  • Maximum counts per channel: 224-1 (i.e., 16 million)

Amplifier

  • Bipolar, 2 µs (fixed) shaping
  • Built-in dead time correction
  • No pole-zero adjustment required
  • Coarse gain settings: 1×, 2×, 4×, 8×,
  • Fine gain settings: 1 to 2.5× in increments of 0.01×

Counting presets

  • Real time
  • Live time
  • Integral of all ROIs
  • Integral of selected ROIs
  • Gross ROI statistics
  • Net ROI statistics
  • Total internal amplifier counts (ICR)
  • Total SCA counts

Computer control (via Quantum-MCA)

  • RS-232 with available baud rates of
    2400, 9600, 19200, 38400, 57600, and 115200
  • RS-485 with baud rate of 115200
  • 10/100 base-T Ethernet with model 2100REN
  • Maximum number of units connected to PC: 8 total

Digital stabilizer

  • Internal ADC and gain stabilization

Multichannel Scaling

  • Input rate: 5 MHz
  • Dwell time: 10 ms to 2.1E7
  • Dead time: 3 µs between passes and 3 µs between channels

Bias supply

  • 0 to +1200 V in 1-V increments (computer controlled)

Preamplifier

  • Charge sensitive
  • Internal for use with detector PMTs

Battery backup for

  • Spectrum
  • Setup parameters
  • Clock memory

Front panel indicators

  • Dead-time meter (3-color LED array)
  • Acquire
  • Pulse event detect
  • Serial communication in progress
  • Power on

Rear panel controls and connectors

  • Power switch
  • 9-pin 12 V DC power connector
  • AUX I/O (auxiliary input/output) rear panel connector (female 9-pin D) with the following connections:
    +5 VDC output (100 mA maximum output)
    Multichannel scaling input (MCS)
    Ground
    SCA output (TTL)
    ADC gate input (TTL signal with software-selectable
    positive or negative polarity for coincidence or
    anticoincidence mode)
  • Fuse housing
  • 9-pin D male RS232 connector
  • BNC female connector for input to the preamplifier
  • SHV female connector for detector bias
  • Two RJ-11 connectors for use with RS485
  • RJ-45 connector for Ethernet (Model MCA2100R-EN)

Power

  • 90-247 VAC, 50-60 Hz with universal power converter (included)
  • or 10-18 VDC@1 A for direct input
  • Typical power consumption: 15 watts

Weight

  • 2.6 lb. (1.2 kg)

Dimensions

  • 2.88 inches (7.32 cm) high
  • 10.9 inches (27.7 cm) deep
  • 7.63 inches (19.4 cm) wide

Software

  • 32-bit QuantumMCA compatible with Windows®

Accessories

  • 14-pin tube base
  • Selection of signal, interface, and detector bias cables
  • Sodium iodide detectors
  • Quantum NaI, Quantum NaI/D, Quantum Gold for advanced quantitative anlaysis