ESR(EPR) Measurement Systems

Model No. esr

1. Desk-top type ESR / EPR

	1.1. Desk-top type ESR(EPR) measurement system [ESR04]
	ESR04 is a very compact, easy-to-handle desktop ESR/EPR (Electron Spin Resonator) system with higher sensitivity than standard X band ESR/EPR (Electron Spin Resonator) system. Adoption of a rare earth permanent magnet realized the miniaturization with a weight of about 27 kg. An optional automatic liquid transmission unit will allow you to perform mixed measurement and analysis of a solution sample under PC control. ESR04 will also expand the field of ESR applications by leaps and bounds, including process monitoring, desktop ESR sensing by PC on hand and remote control. Single purpose use – Magnetic field and frequency can be custom designed according to your specific purpose.
	Detail!

2. Standard type ESR / EPR

	2.1. W-band　ESR(EPR) measurement system (liq.-helium-free type) [ESR01]
	This system is a highly sensitive W-band ESR spectrometer. It is a liquid-helium-free type, and the injection and transfer of liquid helium is not required. We adopt a dielectric waveguide for the guide of millimeter-wave which employs a new concept similar to optical fiber techniques. The feature of this system is as follows. ･ Liquid helium is not required for coolant of superconducting magnet. ･ We decreased the propagation loss of the millimeter wave to 1/3 of the metallic waveguide, and succeeded to make high sensitivity of the measurement. ･ We succeeded to make the structure that is separable a reflection wave of the Fabry-Perot resonator from an incident wave. Thus high sensitivity of the spectrometer was achieved. ･ We made the millimeter wave waveguide more thin, and Fabry-Perot resonator smaller. The diversification of the system pertinent to the analytical purposes was realized. ･ The Fabry-Perot resonator is open-air type. Then large sample can be applicable. ･ The operation is easy, and it is highly sensitive. ･ It is suitable for the ESR measurement of the magnetic substances, dielectric substances, piezoelectric elements, and biological radicals.
	Detail!

	2.2. Standard X-band ESR(EPR) measurement system [ESR02]
	This system is a highly sensitive X-band ESR measurement system. Organic free radical can be easily measured. It is possible to use widely as an analysis and evaluation system in the fields of biochemistry and environmental science.
	Detail!

3. Special Model For Measuring Magnetic Property

	3.1. ESR(EPR) measurement system for magnetic property [ESR05]
	This system is for the magnetic materials, especially the best for the research such as Spintoronics and Quantum dots technology. ･ It has the measurement sensitivity more than that of standard type X band ESR system, because it uses ferromagnetic resonance(FMR) . ･ You can rotate the specimen by two axis accurately, and can incline the specimen. ･ You can change the static magnetic field from zero to high magnetic field up to 500 mT.
	Detail!

4. Alanine dosimetry ESR(EPR) equipment

	4.1. Alanine dosimetry ESR(EPR) equipment [ESR31]
	This is a portable ESR( electron spin resonance) device developed by KEYCOM for alanine dosimetry. The system specializes in measurement for alanine origin radical, conforming JIS standard (JIS Z4571). The size is very compact, with higher sensitivity than the general-purpose device by setting microwave frequency in 9.8GHz, 350 resonance magnetic field mT. We realized through PC control, and also succeeded in using Mn2+ signal, which serves as an internal standard, to correct the magnetic field strength and absorption strength.
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5. Compact ESR(EPR) Systems for Biodosimetry

	5.1. Compact ESR(EPR) Systems for Biodosimetry [ESR34]
	The newly-developed spectrometer is a lightweight (27 kg) one-box ESR device with a resonator showing a Q-factor higher than that of a previous Keycom model, which is quieter, without influence from magnetic modulation, and contains a fingernail positioner. The best measurement result obtained after the cavity Q-factor was increased to more than 7,200 by continuous polishing of the inner surface of the cavity using deerskin. The common mode noise of “magic T” was also successfully decreased to as low as one-half by completely tuning the arm balance. These efforts markedly decreased the noise level and extended downwardly the linear portion of dose dependence as low as 0.4 Gy.
	Detail!