The RHK PPC 200 provides X,Y,Z coarse motion for Beetle scanners. It is also used for HV routing control for Beetle scanners. The PPC200 is a USB-controlled relay switch box that takes input voltages and divides them up and outputs them to the Beetle scan heads (it also has a ground line).
Unique design delivers realtime continuously variable magnetic field. RHK’s VT Beetle is the most mechanically and thermally stable of the many variable temperature SPM designs on the market today. Wide VT operation of the Beetle from approx. 40 K (LHe) to 1500 K is coupled with easily aligned AFM enabling a full range of techniques from advanced NC-AFM to true quantitative friction force measurements. The user can easily switch between STM and AFM in UHV, and exchange and store samples, tips, and probes in UHV. Now RHK brings affordable magnetic capability with uncompromised UHV AFM/STM VT performance. Equipped with a UHV SPM Variable Magnetic Field at a fraction of the cost of a typical system, RHK’s new VMF Beetle delivers a magnetic field in plane with the sample and variable/reversible to 3000 Gauss and beyond. Its unique electromagnet design delivers a reversible and continuously variable field up to 1 Tesla (option) in plane with a sample size of 1 cm. Out of plane magnetic field is also available. The field can be varied real-time while imaging without retracting the probe from the sample. And its smart design means that ex-vacuum convectional electromagnets require no cooling. Five Key Features of the Beetle UHV VMF SPM: 1. Ability to vary the magnetic field while imaging in real-time without retracting the probe. 2. Over 3000 gauss and higher in plane with sample size of 1 cm. Options for a vertical magnet field are available. 3. Electromagnets provide reversible and continuously variable field. 4. Easily reproducible field strength across multiple samples and runs. 5. No compromise in resolution, drift, stability, and vibration isolation. Specifics - Inherent Mechanical and Thermal Stability due to small mechanical and thermal loop, inherently stiff and compact Beetle design, and symmetrical geometry. Thermal drift <1 Å/min. - Easy day-to-day use without frustration of others’ more complex and less intuitive approach. - Strong Field:Up to 1T magnetic field in sample plane. - Options: Out of plane magnetic field available. - Smart Design: Ex-vacuum convectional electromagnets require no cooling and provide continuously variable & reversible fields. - No Compromise: In SPM resolution, drift, or stability. - Heating samples has no impact on Scan Tube, eliminating danger of affecting its thermal coefficient and causing drift. - Beetle design scans more quickly than sample scanners due to fewer restrictions on resonant frequency. - Coarse XY positioning at least 5 mm x 5 mm. - Scan range of at least 5 micron x 5 micron XY - Minimum resolution of 0.5Å (X, Y) and 0.1Å (Z). - Thermal drift <1 Å/min. - Sample temperatures: from approx 40 K (LHe) / 115 K (LN2) to 1500 K. - Beetle sample holder uniquely provides true and accurate sample temperature measurement via thermocouple in direct contact with sample itself. - Sample temperatures from 25 K to 1500 K on SPM sample stage and on manipulator stages in preparation/analysis chambers. - Sample temperature while imaging: 750 K for AFM, 1000 K for STM. - 6 electrical contacts to sample holder (2 for temperature, 2 for heating, 2 for auxiliary use such as BEEM). A single holder conveniently supports all heating and cooling modes – radiative, e-beam, resistive/DC; LN2 and LHe. - Sample holders also available for Cleaving; delivering RF signal to sample; and heating in reactive gases via Quartz Bulb or Ceramic Button. - Sample size 10mm diameter.
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Convenient, economical, easily-upgradeable Beetle for table-top Atmospheric AFM / STM At the intersection of performance and affordability for benchtop, glovebox, or ultimately moving to HV or UHV, Beetle Ambient Systems are a perfect beginning. RHK's ATM (Atmospheric) Beetles provide a unique instrument solution for researchers. The Beetle ATM series offers users a true state-of-the-art SPM instrument that is completely UHV compatible. No other instrument provides this level of functionality with unlimited upgradeability. Features - Dedicated STM or Beam-Deflection-AFM/STM models available for Beetle Ambient Systems - Beetle Scanner Design – Unmatched thermal stability. Scan the same area of a sample repeatedly without drifting - R9plus Controller – The world's standard in control flexibility and performance - Convenient Lexan and frame enclosure for easy bench top or air table use. - Open Design – Optical access to tip/sample interface - UHV materials and construction Specifics - Inherent Mechanical and Thermal Stability due to small mechanical and thermal loop, inherently stiff and compact Beetle design, and symmetrical geometry - Easy day-to-day use without frustration of others' more complex and less intuitive approach - Uncompromised AFM (Beam Deflection) and STM Performance - Beetle-Design Scan Head: Inherently Stiff, Mechanically and Thermally Stable - Highly Evolved R9 plus SPM Control System - Coarse XY positioning at least 5 mm x 5 mm - Scan range of at least 5 micron x 5 micron XY - Minimum resolution of 0.5Å (X, Y) and 0.1Å (Z). - Thermal drift <1 Å/min - Sample size 10mm diameter - Direct upgrade path from ambient Kits to Hi-Vac or UHV complete systems
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Customized for LEED/Auger, sputter ion gun, MBE K-cell, H2 cracker, and numerous spare ports for future expansion capability. System also contains a load lock and manipulator with sample heating (radiative, resistive, and e-beam modes) and LN2 cooling. STM chamber contains a metal evaporator for in-situ evaporation. Frame has space for additional chamber with independent pumping for future expansion.
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Sample Handling Mechanism Transfer Arm with Z motion and rotation. Wobble Stick for sample transfer to/from Transfer Arm and preparation Sample Stage. Transfer arm extends into SPM chamber for sample exchange using SPM wobble stick. Sample Stage Stationary Sample Stage with full range of sample heating, cooling (LN2), and electrical contact capability. Stage can be mounted with sample facing up or down. Contacts on prep stage match contacts on SPM stage. Sample Heating Full range: DC/resistive, radiant, e-beam. Sample Cooling 100 K via LN2. Typical Instruments Electron Beam Evaporator (sample cooled or heated) Effusion Cell (sample cooled or heated) Thermal Desorption Quadrapole Mass Spectrometer Ion Source. Summary Stationary Stage with heat, cooling, and electrical contacts adds key research advantages at a reasonable budget.
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