Voyager DP-263-S Uživatelská příručka stáhnout pdf (Strana 66)

100

101

Chapter 1 Introducing the Voyager™ Biospectrometry™ Workstations

1-36 PerSeptive Biosystems

• Vacuum system—A pumping system and a sealed

enclosure that creates and maintains a high-vacuum

environment for unobstructed ion drift. For more

information, see Section 1.6.3, Vacuum System.

• Flight tube and beam guide wire—A field-free region

(no additional accelerating forces are present) in which

ions drift at a velocity inversely proportional to the square

root of their masses. The voltage applied to the beam

guide wire overcomes the dispersion effect from the ion

source and refocuses ions on the detector.

• Linear detector—A device that detects ions that travel

down the flight tube. The linear detector measures ion

abundance over time and sends a signal to the digitizer

for conversion.

The linear detector is used in Linear mode only. It is not

used in Reflector or PSD mode.

Linear detectors are hybrid high-current detectors

consisting of a single microchannel plate, a fast

scintillator, and a photomultiplier. These detectors have

superior tolerance for high ion currents.

NOTE: High Current detectors are standard on

Voyager-DE STR systems with serial numbers 4112,

4113, and 4116 and later.

•Reflector—A single-stage, gridded mirror that focuses

energy. In reflector mode, a uniform electric field is

applied to the mirror to reflect ions. Ion reflection:

• Filters out neutral molecules

• Corrects time dispersion due to initial kinetic

energy distribution

• Provides greater mass accuracy and resolution

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 611 612

Komentáře k této Příručce

Žádné komentáře

Voyager DP-263-S Uživatelská příručka Strana 66

Komentáře k této Příručce

Související produkty a manuály pro Systémy intercom pro domy Voyager DP-263-S