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Hollow Cathode Plasma Electron Emitters for Ground-based and Space-based Applications
Ground-based Hollow Cathode Plasma Electron Emitters
 
Plasma electron flux: 0-10A
Electron energy: 1-2 eV (typical)
Electron emission efficiency (typical into plasma load):
1-3A/sccm (Ar)
2-5A/sccm (Xe)
Length:  2.7 inches

Hollow Cathode Plasma Electron Emitter (HCPEE) Products

EPL Manufactures four ground-based hollow cathode models, with steady state plasma electron emission current ratings up to 100A.  Operating gasses include Xe, Kr, Ar, Ne, He, N2 and H2.  All share common design and manufacturing heritage and offer mounting interface options.  Custom HCPEE products above 100A are also available.  

Applications include ion beam neutralization, plasma source discharge current and neutralization control, ion sputtering enhancement, substrate surface charge control, plasma volume neutralization, and stand-alone plasma generation.  All hollow cathodes are supported by a complete system package which includes operating power systems, vacuum feed-throughs, and all in-vacuum and out-of-vacuum wiring and mounting connections for immediate customer use.

 

 
 
Plasma electron flux: 0-25A
Electron energy: 1-2 eV (typical)
Electron emission efficiency (typical into plasma load):
1-3A/sccm (Ar)
2-5A/sccm (Xe)
Length:  4.0 inches
 
Plasma electron flux: 0-50A
Electron energy: 1-2 eV (typical)
Electron emission efficiency (typical into plasma load):
1-3A/sccm (Ar)
2-5A/sccm (Xe)
Length:  5.5 inches
 
Plasma electron flux: 0-100A
Electron energy: 1-2 eV (typical)
Electron emission efficiency (typical into plasma load):
1-3A/sccm (Ar)
2-5A/sccm (Xe)
Length:  6.8 inches
Hollow Cathode Plasma Electron Emitter Options/Accessories
 

HCPEE 250 Magnet Stage

  

Magnet Stage for HCPEE Operation in Reactive Gasses

Call for specific operational details and pricing.

 
Ground-based Hollow Cathode Power Supplies
    DUAL 375 SSPS (Start and Standby Power System)
  • For use with two HPCEE-375 emitters
  • Integral hollow cathode emission current balancing circuit
  • Provision for computer control
 
Ground-based Hollow Cathode Systems
 


HCPEE System
  • Hollow Cathode Plasma Electron Emitter (HCPEE) 250, 375, 500, or 625
  
  • Start and Standby Power System (SSPS) for selected HCPEE models
  
  • Vacuum flange with power and gas feed-throughs
  
  • In-vacuum and out-of-vacuum wiring harnesses
  
  • Integrated gas flow electrical isolator
  
  • Remote HCPEE mount
  

Ground-based Hollow Cathode Systems

Utilizing a state of the art, highly integrated design, the Hollow Cathode Plasma Electron Emitter (HCPEE) systems minimize unit cost, and installation and replacement time.  Response to user control inputs is rapid, with excellent plasma electron emission stability during operation.  Each HCPEE system has demonstrated long steady-state and duty cycle lifetimes in numerous applications.

HCPEE systems are available for the 250, 375, 500 and 625 hollow cathodes. Systems are delivered as ready-to-operate packages.  Mounting and interconnects are simple.  Flexible orientation and small size permit installation in space-confined vacuum facilities.  The HCPEE systems require a clean gas feed system and 90-250 VAC at 50/60 Hz for operation.
 
Space-based Hollow Cathode Plasma Electron Emitters
 


SFHC 175F, standard T-mount
Plasma electron flux: 0-3A
Xe gas electron efficiency (typical into plasma load): 50A/mg/s
Status: flight qualified

 

Space Flight Hollow Cathode (SFHC) Products

EPL manufactures two Space Flight Hollow Cathode (SFHC) models, with steady state plasma electron emission current ratings up to 10A. Operating gasses include Xe, Kr, Ar, with other gas choices available upon request. These cathodes have a robust structural design to survive launch vibration and shock.

Power, electron emission efficiency, and component mass are optimized in the SFHC products.  The units are supplied fully mounted and ready for use. Higher current space flight hollow cathodes are available to meet specific customer order requirements.

Complete qualification services are offered by EPL for its SFHC products.  These services include, but are not limited to, life testing, specific user launch vehicle vibration and shock testing, and thermal vacuum hot and cold soak testing.
 


SFHC 250F, unmounted
Plasma electron flux: 0-10A
Xe gas electron efficiency (typical into plasma load): 50A/mg/s
Status: flight qualified and
flight proven
 

Mounting options are available
Power Conditioning Systems for SFHC Products
 

Hollow cathodes: 250F or 175F  (switchable)
Status condition: LED function display
Data monitoring: Built-in test points
Bus voltage: 28 VDC ± 6 VDC

 

 

Power Conditioning Systems for SFHC Products

EPL manufactures two Power Conditioning Systems (PCS) for its space-flight hollow cathodes to support ground-based development or flight programs. The PCS-250F/175F system is designed for ground-based testing of SFHC products, and is in-vacuum compatible when mounted on a temperature-controlled plate. 

The PCS-F is flight qualified and flight proven.  This system supports operation of two SHFC 250F units simultaneously. In addition, the PCS-F supports operation of up to four of EPL's flight qualified and flight proven plasma diagnostic probes.

 
 


Power Conditioning System PCS-F
Hollow cathodes: 2 each 250F SFHCs
Data monitoring: Full telemetry output
Bus voltage: 28 VDC ± 6 VDC


 
If you would like more information, please complete our contact us form.  EPL treats all contact information as strictly confidential.
1040 SYNTHES AVENUE | MONUMENT, CO 80132 | M-F 8am - 5pm | Tel: 719.481.4411 | Fax: 719.481.9703 | email: epl@qwestoffice.net