1. ION PUMP HVFT / Connectors
Varian StarCell Solution (no longer commercially offered as standard)
Gamma Vacuum SAFE-CONN Solution

2. ION PUMP HVFT Gamma Vacuum HVFT Compact, protected HVFT
Commercially available
Reliable
Connection Verification
Safety
Varian StarCell HVFT
Known Corrosion problems
Corrosion problems at SLAC
Dan Wright has a stack of failed HVFTs in his office
SLAC tried gold coating to solve corrosion problem – unsuccessful
Leverage on connector applies to HVFT ceramic – breaks ceramic.
No longer commercially offered as standard

3. High Voltage Safety SAFECONN Safety Interlocking
Separate isolated interlock cable controls high voltage power
Eliminates exposed high voltage lead - Safety
Eliminates false vacuum readings when cable is not connected to pump – Connection Verification
Bakeable & radiation resistant

4. SAFE-CONN HV Cables Standard HV Cablesm m m m m
Other lengths and custom cables available

5. DIGITELTM Controllers
DIGITELTM SPC
Small Pump Controller
Single High Voltage Supplies
15 mA Switching Design
Single Standard Setpoint
2U, 1/3 Rack Packaging
DIGITELTM MPC
Multiple Pump Controller
Up to Two Independent High Voltage Supplies
Up to 4 HV connectors
500 or 100 mA Transformer Design
8 Standard Setpoints
TSP/NEG/ Bake Control Capability

6. System Protection Starting Protection - AutoStart
Ensures pump is properly started by calculating acceptable watts over starting period for specific pump
Automatic shutdown if pump is not operating correctly
Three Auto-restart attempts without user intervention
Running Protection - AutoRun
Continuous wattage monitoring for specific pump
Low voltage cutoff for short and high current conditions

7. System Automation AutoStart/AutoRun
Automatic switch over from starting to running parameters based on monitoring and pump size
Vacuum Loss Monitoring once operational
Auto-Power Recovery (Because of AutoStart/AutoRun)
Can be configured to initiate HV after power loss (maintain Vacuum)
Standard Computer Interface
All features are available for inquiry and control
RS232/422/485
Eight Setpoints standard (4:TTL, 4:Relay)
TSP Automation capability (with Remote TSP Controller)

8. DIGITEL MPC Reliability
Transformer Design
Transformer based power supplies radiate less electrical noise and require less shielding than switching supplies. Switching supplies rely on high frequency capacitor charging to amplify the voltage, creating noise, possibly interference.
Quality Manufacturing & Design
Good, reliable HV designs are difficult, building a switching power supply increases difficulty and takes many more components (10X a transformer HV section). With more components the reliability is reduced.
Field Tested Operation

9. DIGITEL MPC Part Numbers
MPC-1-US N-N
Supply 1: 500-Pos-7KV-K4
Supply 2: None
This is DIGITEL MPC with:
1, 500mA HV section
220V input voltage
Rs 232 communications (485 configurable)
No HV Enable option -N
No TSP Option -N
4 SHV-10 HV outputs

10. DIGITEL MPC Part Numbers
MPC-2-US N-N
Supply 1: 500-Pos-7KV-K1
Supply 2: 500-Pos-7KV-K1
This is DIGITEL MPC with:
2, 500mA HV sections
220V input voltage
Rs 232 communications (485 configurable)
No HV Enable option -N
No TSP Option -N
2 SHV-10 HV outputs (1 for each HV section)

11. DIGITEL MPC Part Numbers
MPC-2-US N-N
Supply 1: 500-Pos-7KV-K2
Supply 2: 500-Pos-7KV-K2
This is DIGITEL MPC with:
2, 500mA HV sections
220V input voltage
Rs 232 communications (485 configurable)
No HV Enable option -N
No TSP Option -N
4 SHV-10 HV outputs (2 for each HV section)

12. SAFE-CONN 5V isolated transformer SAFE-CONN Board CPU Board HV 1 HV 2
Optical Isolation
HV 1
HV1 to Pump 1
HV 2
HV2 to Pump 2

13. SAFE-CONN HV 1 HV 2 DIGITEL MPC Chassis SMB Connector
SAFE-CONN Connection
Pump 1
SAFE-CONN Isolated +5V
HV1 SAFE-CONN Interlock
HV 1
HV1 to Pump 1
SHV-10
Connector
SHV-10
Connector
SMB
Connector
SAFE-CONN Connection
Pump 2
SAFE-CONN Isolated +5V
HV2 SAFE-CONN Interlock
HV 2
HV2 to Pump 2
SHV-10
Connector
SHV-10
Connector

14. SAFE-CONN HV 1 DIGITEL MPC Chassis SMB Connector SAFE-CONN Connection
Pump 1
SAFE-CONN Isolated +5V
HV1 SAFE-CONN Interlock
HV 1
HV1 to Pump 1
SHV-10
Connector “K1”
SHV-10
Connector
HV1 to Pump 2
SHV-10
Connector “K2”
SHV-10
Connector
SAFE-CONN Isolated +5V
HV1 SAFE-CONN Interlock
SMB
Connector
SAFE-CONN Connection
Pump 2

15. SAFE-CONN
SAFE-CONN is a parallel, isolated 5 volt circuit that enables / disables HV. The connection order (Ground, HV pin, then HV enable) and dis-connection order (HV enable, HV pin, then ground) is important in the design. The +5V is isolated to eliminate interference of HV transients and HV shorting to the SAFE-CONN circuitry.