Feedthroughs
122Pages

Feedthroughs In This Section Technical Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 to 3-6 Power Feedthroughs . . . . . . . . . . . . . . . . . . . . . . . .3-7 to 3-27 50 - 1,000 Volts . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7 to 3-10 2,000 - 5,000 Volts . . . . . . . . . . . . . . . . . . . . . . . .3-11 to 3-19 12,000 - 20,000 + Volts . . . . . . . . . . . . . . . . . . . . .3-20 to 3-25 RF Power Feedthroughs . . . . . . . . . . . . . . . . . . . .3-26 to 3-27 Instrumentation Feedthroughs . . . . . . . . . . . . . . .3-28 to 3-67 BNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28 to 3-32 MHV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-33 to 3-36 SHV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-37 to 3-44 Type N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-45 to 3-48 SMA & SMB . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-49 to 3-51 “Between Series” BNC to Microdot . . . . . . . . . . . . . . . . . .3-52 MPC Multi-Pin . . . . . . . . . . . . . . . . . . . . . . . . . . .3-53 to 3-56 MPDT Sub D-Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-57 Subminiature-C Multipin . . . . . . . . . . . . . . . . . . . . . . . . . .3-58 Ribbon, Ring, UHV, Air Side Cable Assemblies . . . . . . . .3-59 MS Multi-Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-60 to 3-65 MPT Multi-Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-66 to 3-67 Thermocouple Feedthroughs . . . . . . . . . . . . . . . .3-68 t 3-106 Type C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-68 to 3-71 Type E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-72 to 3-82 Type J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-83 to 3-91 Type K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-92 to 3-101 Type R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-102 to 3-103 Type T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-104 to 3-105 Thermocouple Feedthrough Probes . . . . . . . . . . . . . . . .3-106 Gas/Liquid Feedthrough . . . . . . . . . . . . . . . . . .3-107 to 3-108 LN2 Feedthroughs . . . . . . . . . . . . . . . . . . . . . . .3-109 to 3-110 Ceramic Breaks . . . . . . . . . . . . . . . . . . . . . . . . . .3-111 to 3-112 Connectors & Cabling . . . . . . . . . . . . . . . . . . . .3-113 to 3-118 Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-119 to 3-121

Technical Notes As used here, the word feedthrough applies to devices that transfer all types of services, utilities, and signals through the vacuum wall. The major divisions are electrical, gas and liquid, cryogen (LN2), and optical. While many regard them as feedthroughs, these Technical Notes do not cover viewports (Section 1) or motion devices (Section 8). Electrical feedthroughs are divided into four groups: Power, Instrumentation, Thermocouple, and Ceramic Breaks. Power feedthroughs have one or multiple conductors penetrating the vacuum wall to carry electricity to any powered vacuum...

Thermocouple Feedthroughs Thermocouples (T/Cs) are two dissimilar metal wires that meet at a (welded) junction. The junction's temperature and the individual wire's composition determine the voltage difference (often called "EMF" for electromotive force) between the wires' ends. Ideally, each wire's composition is unchanged from junction to the measurement device—nominally a voltmeter. That means the signals should be transferred through the vacuum wall by wires of identical composition too, and that is the function T/C feedthroughs can have one or multiple pairs of wires. The wires are...

Technical Notes ➤ Feedthroughs ■ Gas-Liquid Feedthroughs These are mainly for delivering liquids or gases to a vacuum-mounted device, often to maintain the device’s temperature or actuate some gas/liquiddriven rotor. Standard flanges and baseplate ports have one or multiple tubes welded to through-holes, so the tubes extend out on both sides of the flange. The tubes have various diameters and are often terminated with a small flange or gas fitting, such as Swagelok® or Cajon®. For multi-tube feedthroughs, certain combinations of tube diameter/numbers will not fit within certain flange’s...

Technical Notes ➤ Part Number Charts Explained ■ Part Numbers for Cables Part No. FTA xxxCBL xxxxxxNN Specification Feedthrough Accessory Cable Cable Diameter type B type C BNC MHV Microdot 12" 24" 36" Terminations End 1 & End 2 (See next table for explanation) IN THIS SECTION ➤ Part Number Charts The charts outline the system of Part Numbers. Each position in the Part Number provides information on the product’s specifications or properties. Spaces designated “N’’ in this list are filled with a number or letter code explained at left. We can supply customers with configurations other than...

Technical Notes ä Part Number Charts Explained n Part Numbers for Power Feedthroughs n Part Numbers for Instrumentation Feedthroughs Part No. Specification E F T Solid Conductors F T T Tubular Conductors Maximum Voltage in kV x x x N N Number of Conductors x x x x x N x x x x x x N Conductor Material: x x x x x x x N N Conductor Diameter in 1/100” x x x x x x x x x N N Termination CF Code Indicates — — — — 0 500V or Less, 1000V, 1 12,000, etc. 12 Number From 1–9 Conductors V 10 W 12 Nickel 1 2 Stainless Steel 3 Copper 4 Molybdenum 5 Alumel® 6 Constantan 7 Kovar® Part No. Specification IFT...

Power Feedthroughs Power Feedthroughs Style Material Solid Conductor Copper Water-Cooled Conductor Copper Figure 1 (solid conductor) Figure 2 (water-cooled conductor) Figure 2 (2 pins or 2 tubes) Figure 3 (4 pins or 4 tubes) Price Call Call • hese high-voltage, high-current electrical T feedthroughs terminate in baseplates, weldable lips, CF flanges, KF flanges, and male pipe thread • Constructed from vacuum-grade materials, including OFHC copper and nickel conductors, 304 stainless steel mounts, high-purity alumina ceramic insulation, and vacuum-tube grade braze alloys • Units are designed...