Used GATAN 691 #293827025 for sale

GATAN 691 is an ion milling equipment used for preparing specimen surfaces for transmission electron microscopy (TEM). It uses an ion source to bombard a surface with accelerated and focused ions. The ions interact with the specimen's surface, causing material to be ejected at increasingly higher angles and eventually eliminating the surface. This technique, known as "sputtering", allows for the removal of surface layers without thermal damage and without mechanically affecting the substrate material. 691 is a high-efficiency ion milling system. It consists of an ion gun chamber, a Faraday shield, a specimen holder, a sample heating stage and a control unit.The ion gun chamber contains four sputter guns set to different angles. These guns uniformly direct ion beams at the specimen, which is then bombarded with the accelerated ions. A Faraday shield around the ion gun chamber prevents electrical interference from external fields. The specimen holder is adjustable to hold specimens of different sizes. It also allows for the specimens to be heated up to 1000°C for optimal sputtering performance. The sample heater is controlled by a computer program, which allows for precise control over the temperature of the specimen . GATAN 691 unit is easy to use and highly efficient. It features a machine of controls that allow the user to adjust the ion source parameters, such as the sputter rate, ion beam energy and beam current. It also features a manual control for specimen motion and tilt for fine-tuning. 691 provides a safe and reliable method for specimen surface preparation. It is suitable for a range of applications such as surface imaging and analysis, conductive coating, and etching. With its high-precision ion source and its multiple sputter guns, GATAN 691 ion milling tool can provide an accurate and efficient time-saving technique for specimen surface preparation.