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MHV Coaxial Components

4x single-ended grounded shield MHV CF feedthrough Show Grounded, CF Feedthroughs for 4x single-ended grounded shield MHV CF feedthrough
Grounded, CF Feedthroughs
Single-ended floating shield MHV CF feedthrough Show Floating, CF Feedthroughs for Single-ended floating shield MHV CF feedthrough
Floating, CF Feedthroughs
Single-ended grounded ISO feedthrough and double-ended grounded-shield ISO feedthrough Show Grounded, ISO KF Feedthroughs for Single-ended grounded ISO feedthrough and double-ended grounded-shield ISO feedthrough
Grounded, ISO KF Feedthroughs
Single-ended floating ISO feedthrough and double-ended floating-shield ISO feedthrough Show Floating, ISO KF Feedthroughs for Single-ended floating ISO feedthrough and double-ended floating-shield ISO feedthrough
Floating, ISO KF Feedthroughs
Accu-Fast 500, 875 and MHV male connector to cables Show UHV Cables for Accu-Fast 500, 875 and MHV male connector to cables
UHV Cables
Accu-Fast 500 and 875 connectors with male MHV connector and user-end female connector Show UHV Components for Accu-Fast 500 and 875 connectors with male MHV connector and user-end female connector
UHV Components
Close up of male MHV connector to connector and a MHV air side connector Show Air Cables / Components for Close up of male MHV connector to connector and a MHV air side connector
Air Cables / Components

MHV (Miniature High Voltage) Coaxial Feedthroughs

The Miniature High Voltage connector, usually referred to as an MHV coaxial connection, is commonly used in conjunction with low noise 50-Ohm instrumentation lines.  Accu-Glass Products' MHV coaxial feedthroughs are constructed with either floating shields or grounded shields. interface

Floating shields provide two concentric conductors: one outer conductor concentric with, and enclosing, a cylindrical center conductor.  Both electrical paths are electrically isolated from the vacuum flange.

Grounded shields provide only one electrical path that is electrically isolated from the vacuum flange.  With grounded shields, the shield and vacuum flange are electrically common.

Ultrahigh (UHV) compatible coaxial cable assemblies are available to meet the needs of most in-vacuum, low noise instrumentation cable applications.  The vacuum side of a single ended, grounded and floating MHV feedthrough consists of a 0.094 inch diameter conductor pin that mates perfectly with Accu-Glass' grounded or floating AccuFast™ connector interface.  These can also be used for High Vacuum (HV) applications.

Glow Discharge Graphs

Features

  • MHV Coaxial Interface
  • Grounded and Floating Shield
  • Single and Double Ended configurations
  • Kapton® insulated 50-Ohm cable
  • High temperature rated to 250°C
  • UHV compatible construction
  • Conflat® and ISO KF compatible mounts
  • Air service cables / connectors
  • Custom solutions on request
     

Specifications

Electrical 
Voltage 1, Maximum 
   Grounded Shield5,000 VDC
   Floating Shield2,500 VDC
   Current, Max @ 20°C3 A
Material 
Shell304 Ss
Pin / Conductor304 Ss
Insulation, CeramicAlumina
Connector, Vacuum 2 
   AccuFast™PEEK / Ss
   MHVPEEK / Brass / Ss
Connector, AirComposite
Cable InsulationKapton®
Vacuum Range 
UHV, Ultrahigh vacuum1x10E-10 Torr
HV, High vacuum1x10E-8 Torr
Temperature Range 
Feedthrough-200 to 250°C
Flange, Conflat®450°C
Flange, ISO150°C
Connector / Cable, Air165°C
Connector / Cable, UHV PEEK250°C
Thermal Gradient, Maximum25°C/minute
Notes 
  1. Electrical ratings are maximum test values, with feedthrough's vacuum side at ≤ 1x10E-4 Torr. Feedthroughs are intended for instrumentation applications carrying low level signal voltage and current.
  2. PEEK is a polyether ether ketone thermoplastic.
  3. Overall assembly ratings must be adjusted to that of its lowest rated component. For cryogenic service, the lowest recommended temperature is -200°C
  4. Connectors and cables are not included with feedthrough and must be purchased separately.