
Parts of the Voyager-DE STR System
Voyager
™
Biospectrometry
™
Workstation User’s Guide 1-35
1
Parts of the mass
spectrometer
The Voyager-DE STR mass spectrometer includes:
• Laser, attenuator, and prism—A nitrogen laser that
operates at 337 nm and ionizes sample. It produces
3-nanosecond-wide pulses (factory set to 3 Hz). Laser
rate is not user-settable.
The laser attenuator varies the intensity of the laser beam
reaching the sample.
The prism deflects the laser beam into the ion source.
• Ion Source—A high voltage region used to accelerate
ions. Includes:
• Sample plate and sample stage—An area
supplied with voltage (0 to 25,000 V) for
acceleration of ions into the flight tube.
• Variable-voltage grid—A grid supplied with
additional voltage to fine-tune ion acceleration.
• Ground grid—Ground surface for formation of
potential gradient.
• Collision cell—Provided with CID
(Collision-Induced Dissociation) option for
enhanced fragmentation in PSD analysis.
• Grounded aperture—Entrance to flight tube.
For more information on the ion source and voltages, see
Section 5.4.4.2, Setting Accelerating Voltage, and
Section 5.4.3.5, Optimizing Grid Voltage%.
• Video camera—A camera that displays a real-time
sample image (100 times magnification) on the video
monitor.
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