Used GATAN 691 #293807220 for sale

GATAN 691 is an ion milling equipment designed for precision specimen preparation for electron microscopic analysis. Ion milling is a method in which a beam of energetic ions is used to remove successive layers of a specimen in order to create a clean surface for high resolution electron microscopy. 691 offers easy user control of the beam energy, current and angle, maximizing the efficiency of the milling process. This system utilizes a high resolution ion beam column to precisely direct the ion beam over the specimen surface. Its high mass resolving power enables superior control over the size of ions implanted into the surface. The ion beam column is capable of producing an ion beam of 1 nm in diameter, improving the repeatability and accuracy of the milling process. The ion beam of GATAN 691 can be further adjusted using three different modes, each of which provides independent control of beam-to-specimen distance, beam energy, and current. The three modes are electron-material-interaction-mode (EMIM), ion-absorption-mode (IAM), and ion-sputtering-mode (ISM). In EMIM, ions are implanted into the specimen, causing a chemical reaction, while in IAM the ions are allowed to pass through the specimen, improving the surface quality for viewing in an electron microscope. ISM takes advantage of both of the prior modes to create a highly uniform etch rate, and eliminates surface rip-plucking and over-etching. 691 additionally provides programming and scripting capabilities for more complex milling patterns and processes. With the ability to program multi-axis motion of the specimen and beam, an experienced user can program intricate milling and imaging sequences. This unit also provides safety warnings for when the ion beam is misdirected, ensuring safe operation at all times. Finally, GATAN 691 is designed to work with other GATAN equipment such as the post-ion milling prepping machine and the high space resolution imaging tool. These additional tools further increase the capabilities of 691 and make it an ideal asset for precision specimen preparation. GATAN 691 is a powerful tool and an essential addition to any electron microscope laboratory.