Agilent G7004-20065 is an original entrance electrostatic lens designed for the EI High Efficiency Source (HES) used in selected Agilent GC/MS systems. It is the Entrance Lens Assembly, Extended, HES (1), forming part of the ion-optics system within the ion source.
The lens supports proper ion guidance and focusing as ions travel from the ionization region toward the downstream mass analyzer optics.
Function in the Ion Source
The entrance lens forms part of the electrostatic lens stack in the HES ion source.
Its functions include:
- directing ions away from the ionization region,
- helping focus the ion beam,
- supporting efficient ion transmission to downstream ion optics,
- contributing to stable and sensitive mass-spectrometer performance.
Position in the HES Assembly
Within the HES ion source, G7004-20065 is identified as lens No. 1.
Related lens-stack components include:
- G7004-20068 – Ion Focus Lens (2)
- G7004-20090 – Post Extractor Lens 2 (3)
- G7004-20004 – Post Extractor Lens 1 (4)
- G7004-20061 – Extractor Lens (5)
The number in parentheses corresponds to the number engraved on the lens.
Compatibility
G7004-20065 is documented for EI HES configurations in:
- Agilent 5977B Series GC/MSD
- Agilent 5977C Series GC/MSD
- Agilent 7000 Series Triple Quadrupole GC/MS
- Agilent 7010 Series Triple Quadrupole GC/MS
The exact instrument should be verified as being equipped with the HES – High Efficiency Source, because other ion-source configurations use different ion-optics components.
