Used GATAN 691 #293822456 for sale

GATAN 691 is an ion milling equipment designed to prepare clean and high-quality electron microscope samples. It uses ion beams of various elements such as Ar+, BF2+, Ga+ and Cs+ to remove bulk material from the sample's surface layer. This is achieved through a process called sputtering. It uses high-energy ions that interact with the sample's surface, physically abrading material atom-by-atom until the desired depth is reached. The sputtering process also causes chemical reactions between the sample and the gas surrounding the sample leading to chemical cleaning of the sample. Ion milling is a critical step prior to scanning electron microscope imaging or electron diffraction. It is necessary to have a flat, clean surface of the sample in order to obtain clear, high-resolution results. 691 can produce sharp etch rates as low as 1nm per second and etch rates as high as 45nm per minute. The system also features an automated sample transfer unit, preventing contamination of the sample while loading or unloading it. It also features an electron-beam etching mode which allows for precise pinpoint etching, ensuring that no etching damage is done to neighboring areas of the sample. GATAN 691 is featured with an automated depth control and end-point detection sensors that ensure consistent and repeatable sample preparation. It also has an automatic gas switching capabilities allowing the user to measure the depth of the etch profile in smaller and more easily controlled steps. 691 machine is a reliable and versatile tool for specimen preparation. The wide range of sample preperation options and its ease of use makes it ideal for a variety of materials and sample preparation techniques. It is essential for many laboratories for their research where sample preparation plays a crucial role.