High Mass Range Quadrupole Mass Spectrometers

The MAX-HM family of high mass quadrupole mass spectrometers with mass range options to 16,000amu.

The MAX-HM high mass range quadrupole mass spectrometers are a family of instruments with extended mass range options. They are configured with a range of specific combinations of triple filter quadrupole rod sizes (9.5mm and 19mm) and RF operating frequencies (440kHz to 1.2MHz) to achieve maximum mass capability whilst still maintaining excellent transmission characteristics. Delivered as compact, fully UHV compatible bolt-on instruments, they can be configured with a comprehensive range of application specific configurations for atomic and molecular physics and chemistry experiments including;

Max-HM High Mass Range Quadrupole Mass Spectrometer

  • Low cost analysis of bio-molecules (peptides and proteins)
  • Clusters of molecules for deposition onto surfaces
  • Plasma polymerisation studies
  • Temperature programmed desorption
  • Static and dynamic SIMS/SNMS
  • Laser molecule interactions
  • Photoionization
  • Molecular beam clustering studies

For combined applications also requiring very high resolution over reduced mass range, the RF power supply can be simply swapped with a second, different frequency version without any further modification.

MAX-HM High Mass Range Quadrupole Mass Spectrometer:

  • 9.5mm or 19mm triple filter quadrupole
  • 1-500amu mass range
  • 1-1000 amu mass range
  • 2-2000 amu mass range
  • 4-4000 amu mass range
  • 20-16000 amu mass rangeHigh Mass Quadrupole Mass Spectrometry
  • Positive ion and negative ion measurement
  • Appearance potential and electron attachment modes for neutrals and radicals
  • Dual analogue and ion counting detector for highest dynamic range
  • Conversion dynode
  • Pole bias mid-axis potential
  • Einzel lens optics
  • Axial and right angle sampling configurations
  • 1E-16mbar detection capability
  • Tandem source with high transmission energy filter with <0.5eV energy resolution
  • Photoionization cross beam source
  • Enclosed CI source


Max Series Quadrupole Mass Spectrometer Configurations



MAX-HM High Mass Range  Quadrupole Mass Spectrometers:

Mass Spectrometer

System

Mass

Range

Rod

Size

Operating

Frequency

Relative

Transmission

Resolution

(M/ΔM FWHM)

Sensitivity

(mA/Torr)

MAX-16000
20-16,000amu
9.5mm
440kHz
15%
1000
0.075
MAX-4000HT
4-4,000amu
19mm
440kHz
50%
1500
0.75
MAX-2000
2-2,000amu
9.5mm
1.2MHz
25%
1500
0.3
MAX-1000
1-1,000amu
19mm
880kHz
50%
1800
1
MAX-500HT
1-500amu
19mm
1.2MHz
60%
2000
2

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