Helium-3 Cryostat provides atomic resolution STM measurements.
August 12, 2014 -
Featuring central UHV tube and gate valve, Model HE-3-TLSUHV-STM offers top-loading access to low temperature, high magnetic field region for sample and tip exchange. System can be integrated with commercially supplied or user-built STM. Vertical, horizontal, and 2D/3D vector field superconducting magnets are fully integrated. With operating time of >80 hr at base temperature of <300 mK, system includes mechanical heat switch for rapid precooling, and cooled 4 K and 1.5 K radiation shutters.
Janis Top-loading Helium-3 Cryostat (<300 mK) with Sample in UHV - for Atomic Resolution STM
Janis Research Co., Inc.
2 Jewel Dr.
Wilmington, MA, 01887
Press release date: August 7, 2014
Woburn, Massachusetts, USA — The Janis Research ultra-low temperature (ULT) group is proud to announce the development of an enhanced top-loading Helium-3 cryostat with sample in UHV environment, the model HE-3-TLSUHV-STM. This ULT system is optimized for atomic resolution STM measurements, and can be integrated with a commercially supplied or user-built STM. A central UHV tube (32 mm diameter or larger) and gate valve provide top-loading access to the low temperature, high magnetic field region for sample and tip exchange. Vertical, horizontal, and 2D/3D vector field superconducting magnets are available and fully integrated.
ULT STM systems are frequently used to investigate the electronic and magnetic properties of materials. Applications include quantum computing and information, future electronics, and nanoscale manufacturing. A ULT STM system can be used to observe or manipulate the topography and electronic structures of atoms, islands, molecules, and surfaces. Techniques such as magnetic force microscopy (MFM) and spin polarized STM can be used to investigate a variety of materials, in conjunction with variable temperature and magnetic field conditions. Typical materials studied include metals, semiconductors, thin films, and carbons such as graphene and carbon nanotubes.
The Janis HE-3-TLSUHV-STM provides operating time of >80 hours at a base temperature of <300 mK; longer operating times are also possible by using additional He-3 gas. Quiet operation is assured through the use of proprietary acoustic noise reduction features inside the 1 K pot, and vibration reducing mechanical support structure on the He-3 pot; it is also possible to operate the system without pumping on the 1 K pot for further vibration reduction. The system includes a mechanical heat switch for rapid precooling, and also includes cooled 4 K and 1.5 K radiation shutters for maximum hold time and minimum base temperature. Other available features include a sliding seal, low and high frequency wiring, and pre-installed optical fibers.
For more information contact:
Janis Research Company, LLC
225 Wildwood Avenue
Woburn, MA 01801 USA
Phone: +1 781 491-0888, extension 119
FAX: +1 781 491-0889