Our traditional vacuum chamber is available for your testing needs. It has an inside diameter of 30” and a height 30”.   It's features are described in detail below.

Pumping System

Pumping for the chamber is provided by a 1,500 L/min mechanical pump and 69,000 L/min turbo molecular pump.  Pumping time to an operating pressure in the low 10 -4 Torr range is approximately ten minutes.  The chamber vents to gaseous nitrogen in two and half minutes.  The pumping system is fully interlocked for ease of use and safety of the equipment.

Electrical Feed-Through Connectors

Four 50-pin hermetically sealed D-shell male connectors and 12 BNC connectors are provided for communication with the devices under test. Be aware that when using the D-Shell connectors, pin #1 on the outside corresponds to pin #17 on the inside and so forth.   See the schematic of the D-Shell connectors here. Connection to these from a table top in the data room requires cables of 20' to 25' in length.

Target Mounting Fixture

The target mounting fixture is designed for standard printed circuit boards. It is a 10” by 10” aluminum frame with six 6-32 threaded holes for attaching the printed circuit board and two 0.25” diameter locating pins to insure reproducible positioning.  Specifications for such a board are detailed here.

Target Positioning System

The target positioning assembly allows the motion of the target in four directions:  X, Y, Z and Theta.  X and Y are the horizontal and the vertical axis in the target plane, respectively.  Z is the axis perpendicular to X and Y.  Theta is the angle of rotation about the target chamber vertical symmetry axis.  Target position verification is provided by the means of a CCD camera aligned with the beam path and a narrow laser beam that crosses the beam path at the center of the target chamber.  The size of the exposed area is controlled by the aperture defined by a pair of remotely adjustable horizontal and vertical slits.