A high voltage power system is disclosed. In some embodiments, the high voltage power system includes a high voltage pulsing power supply; a transformer electrically coupled with the high voltage pulsing power supply; an output electrically coupled with the transformer and configured to output high voltage pulses with an amplitude greater than 1 kV and a frequency greater than 1 kHz; and a bias compensation circuit arranged in parallel with the output. In some embodiments, the bias compensation circuit can include a blocking diode; and a DC power supply arranged in series with the blocking diode.

Provided is a charged particle beam device that can impart a function of an energy filter to even a small BSE detector. The charged particle beam device includes a fluorescent substance that converts charged particles generated by irradiation of a sample with a charged particle beam into light; a detector that detects the light emitted from the fluorescent substance; a light guide element for guiding the light from the fluorescent substance to the detector; a light amount adjuster that adjusts the amount of light that is received by the detector through the fluorescent substance and the light guide element; and a control unit that controls the light amount adjuster.

A method of producing an induced pluripotent stem cell, comprising the step of introducing at least one kind of non-viral expression vector incorporating at least one gene that encodes a reprogramming factor into a somatic cell. In some embodiments, the gene that encodes a reprogramming factor is one or more kind of genes selected from the group consisting of an Oct family gene, a Klf family gene, a Sox family gene, a Myc family gene, a Lin family gene, and the Nanog gene.

The invention provides a power supply device and a charged particle beam device capable of reducing noise generated between a plurality of voltages. The charged particle beam device includes a charged particle gun configured to emit a charged particle beam, a stage on which a sample is to be placed, and a power supply circuit configured to generate a first voltage and a second voltage that determine energy of the charged particle beam and supply the first voltage to the charged particle gun. The power supply circuit includes a first booster circuit configured to generate the first voltage, a second booster circuit configured to generate the second voltage, and a switching control circuit configured to perform switching control of the first booster circuit and the second booster circuit using common switch signals.

A plasma processing apparatus includes: a processing container; an electrode that places a workpiece thereon; a plasma generation source that supplies plasma into the processing container; a bias power supply that supplies a bias power to the electrode; an edge ring disposed at a periphery of the workpiece; a DC power supply that supplies a DC voltage to the edge ring; a controller that executes a first control procedure in which the DC voltage periodically repeats a first state having a first voltage value and a second state having a second voltage value, the first voltage value is supplied in a partial time period within each period of a potential of the electrode, and the second voltage value is supplied such that the first and second states are continuous.

In a high voltage, variable frequency radiation generation system, a carrier signal supplied to a primary coil of a transformer is varied, e.g., turned ON and OFF at variable frequencies. The ON duration and/or the average amplitude of the carrier signal may also be varied. Moreover, the carrier signal may be modulated using an audio signal. The parameters to control the variation of the carrier can be provided as a recipe via a software application. A server can provide different types of apps providing different control features. The server may also collect user characteristic data and recipe usage data, and may facilitate exchange of these data and may recommend recipes based on a particular user characteristic.

The present invention provides for a high voltage direct current power supply including a primary high voltage direct current supply offering a primary output; a floating secondary output floating with respect to the primary output and fed by the primary output: an output terminal at the floating secondary output for providing an output voltage; a controller operative to detect a change in the output voltage at the output terminal and to generate a control signal responsive to the change in output voltage; and a controllable current source, which can comprise a programmable current source, arranged to provide current at the floating secondary output responsive to the said control signal and whereby the said current is provided to reduce charging of a secondary output capacitance as the output voltage changes.

There is provided a control method for an electron microscope including a thermionic-emission gun of self-bias type using a fixed bias resistor, an accelerating voltage power supply supplying an accelerating voltage to the thermionic-emission gun, and an optical system for irradiating a specimen with an electron beam. The control method includes: obtaining a value of a load current which is a current passing through an accelerating voltage power supply; determining a filament height of the thermionic-emission gun based on the value of the load current; and setting a condition of the optical system based on the filament height.

An impedance matching device is to be provided between a load and a high frequency power supply in which output power is modulated to a high output and a low output alternately. The impedance matching device calculates an impedance or a reflection coefficient of a case where the load side is viewed from an output end of the high frequency power supply. The impedance matching device performs, based on results of the calculations performed in a first period in which the output power is the high output and in a second period in which the output power is the low output, operations for the impedance matching in the subsequent second period and first period respectively. The impedance matching device achieves, based on results of these operations, the impedance matchings in the subsequent first period and second period respectively.

Systems and methods are provided for aggregating and assigning power capacity for charging electric vehicles and providing power to other loads. The systems include a DC bus system used to harmonize and combine power drawn from grid connections having different electrical characteristics such as different voltages or phase levels and from other devices such as energy storage systems and generators at the site. Using the systems and methods can help enable utility customer sites to providing electric vehicle charging, especially for multiple electric vehicles, where the sites would otherwise not have sufficient power to do so without significant and expensive service upgrades and modifications.