Abstract: A rotation mechanism (20) of a vacuum pump (100) includes a magnetic bearing unit (21) having a first outer diameter (91), the magnetic bearing unit (21) being operable as a first radial magnetic bearing (40), and a motor unit (22) provided on a side of a second end (11b) of a rotary shaft (11) relative to the magnetic bearing unit, the motor unit (22) having a second outer diameter (92) larger than the first outer diameter, the motor unit (22) being operable as both a motor (30) and a second radial magnetic bearing (50).

Abstract: A vacuum pump (100) includes a rotor (22b), a rotor blade (13), and a magnetic-bearing-integrated stator (22a) including a coil. The rotor includes a pair of spacer members (29), a support member (27), a permanent magnet (26), and a protective ring (28), and in an axial direction of a rotary shaft (11), the support member has a mechanical strength higher than that of the protective ring.

Abstract: A cell culture container includes: an insert member having a membrane on which a cell is seeded, the insert member defining a first inner space that functions as an anaerobic chamber; a container having an attachment/detachment portion to and from which the insert member is attachable and detachable, the container defining a second inner space that functions as an aerobic chamber; a sealing member that closes an opening of the aerobic chamber between the attachment/detachment portion and the insert member with the insert member being attached to the attachment/detachment portion; and a transfer mechanism that transfers force to the sealing member. The sealing member closes the opening in response to an input of the force from the transfer mechanism.

Abstract: A cell culture container includes: a container body; a cell culture insert having a tubular portion and an oxygen-permeable membrane; and a lid member. The container body is provided with an opening that communicates with an interior of the container body. The tubular portion includes an upper end and a lower end, and is inserted in the opening such that the lower end is located inside the container body. The lower end side of the tubular portion is closed by the membrane. The upper end side of the tubular portion is closed by the lid member. The lid member includes a lower surface that faces toward an interior of the tubular portion. The lid member is provided with an electrode insertion port and a culture medium outlet port that each communicate with the interior of the tubular portion at the lower surface.

Abstract: A cell culture system includes: a first pump; and a first cell culture container and a second cell culture container. The first cell culture container has a first culture medium circulation flow path. The second cell culture container has a second culture medium circulation flow path independent of the first culture medium circulation flow path. The first culture medium circulation flow path and the second culture medium circulation flow path are fluidly connected to the first pump.

Abstract: A vacuum pump (100) includes a rotor (22b), a rotor blade (13), and a magnetic-bearing-integrated stator (22a) including a coil. The rotor includes a pair of spacer members (29), a support member (27), a permanent magnet (26), and a protective ring (28), and in an axial direction of a rotary shaft (11), the support member has a mechanical strength higher than that of the protective ring.

Abstract: A rotation mechanism (20) of a vacuum pump (100) includes a magnetic bearing unit (21) having a first outer diameter (91), the magnetic bearing unit (21) being operable as a first radial magnetic bearing (40), and a motor unit (22) provided on a side of a second end (11b) of a rotary shaft (11) relative to the magnetic bearing unit, the motor unit (22) having a second outer diameter (92) larger than the first outer diameter, the motor unit (22) being operable as both a motor (30) and a second radial magnetic bearing (50).

Abstract: A feedback control apparatus includes: a detector configured to detect an output value based on a controlled object; a P control circuit including a differential amplifier circuit and an analog circuit, the differential amplifier circuit being configured to receive a detection value of the detector and a target value, the analog circuit being configured to output a P control component VP to an output of the differential amplifier circuit; an I control unit configured to output an I control component VI by integrating a deviation of the detection value from the target value by digital processing; and a driver element configured to be driven based on the P control component VP from the P control circuit and the I control component VI from the I control unit to control the controlled object.

Abstract: A pressure control valve includes a pressure control block including a bore hole that is bored perpendicularly from one outer surface, and two internal channel openings of whose end portions are at a bottom surface of the bore hole, a valve body having elasticity and covering the bottom surface of the bore hole, a sealing member for pressing a portion of the valve body against the bottom surface of the bore hole, the portion abutting a peripheral edge portion of a portion of the bottom surface where the openings are provided, and an actuator for driving a portion, of the valve body, abutting the portion where the openings are provided in a direction perpendicular to the bottom surface of the bore hole.

Abstract: A supercritical fluid chromatograph includes a supercritical flow path, a mobile phase supply section for supplying a mobile phase containing liquid carbon dioxide, a sample introduction section, a sample separation section, a detector, and a pressure control valve. A valve post-stage flow path is connected to a fluid outlet of the pressure control valve, and the inside of the valve post-stage flow path is maintained by pressure maintaining means at a pressure by which a mobile phase from the fluid outlet of the pressure control valve is not vaporized.

Abstract: A feedback control apparatus includes: a detector configured to detect an output value based on a controlled object; a P control circuit including a differential amplifier circuit and an analog circuit, the differential amplifier circuit being configured to receive a detection value of the detector and a target value, the analog circuit being configured to output a P control component VP to an output of the differential amplifier circuit; an I control unit configured to output an I control component VI by integrating a deviation of the detection value from the target value by digital processing; and a driver element configured to be driven based on the P control component VP from the P control circuit and the I control component VI from the I control unit to control the controlled object.

Abstract: A pressure control valve includes a pressure control block including a bore hole that is bored perpendicularly from one outer surface, and two internal channel openings of whose end portions are at a bottom surface of the bore hole, a valve body having elasticity and covering the bottom surface of the bore hole, a sealing member for pressing a portion of the valve body against the bottom surface of the bore hole, the portion abutting a peripheral edge portion of a portion of the bottom surface where the openings are provided, and an actuator for driving a portion, of the valve body, abutting the portion where the openings are provided in a direction perpendicular to the bottom surface of the bore hole.

Abstract: A supercritical fluid chromatograph includes a supercritical flow path, a mobile phase supply section for supplying a mobile phase containing liquid carbon dioxide, a sample introduction section, a sample separation section, a detector, and a pressure control valve. A valve post-stage flow path is connected to a fluid outlet of the pressure control valve, and the inside of the valve post-stage flow path is maintained by pressure maintaining means at a pressure by which a mobile phase from the fluid outlet of the pressure control valve is not vaporized.

Abstract: The present invention provides a particle counter capable of accurately discriminating the signal of scattered light by real particles from the background light noise, and furthermore, capable of detecting smaller particles than conventional particle counters. The particle counter according to the present invention includes: a light irradiator for emitting light to the measurement area 40 in a vacuum state or in a near vacuum state; a scattered light detector 32 for detecting scattered light generated when the light is delivered to the measurement area 40; a discriminator 18 for determining whether or not a particle exists in the measurement area 40 by comparing the detection signal of the scattered light detector 32 and a predetermined discrimination threshold; a vacuum gauge 12 for measuring the pressure of the measurement area 40; and the threshold setting unit 16 for setting a discrimination threshold in accordance with the pressure of the measurement area 40.

Abstract: The present invention provides a particle counter capable of sensitively determining the contamination level of a light transmission window. The particle counter according to the present invention includes: a light source 281 for emitting light through a light incident window 24 to a measurement area 40 in a vacuum state or in an approximately vacuum state; a scattered light detector 32 for detecting scattered light through a detection window 30, the scattered light being generated when a light is delivered to the measurement area 40; a vacuum gauge 12 for measuring the pressure of the measurement area 40; a signal processor 13 for converting a detection signal of the scattered light into an electrical signal; and a contamination level determiner 19 for determining the contamination level of the transmission window from the time average of the electrical signal and the pressure.

Abstract: The present invention provides a particle counter capable of accurately discriminating the signal of scattered light by real particles from the background light noise, and furthermore, capable of detecting smaller particles than conventional particle counters. The particle counter according to the present invention includes: a light irradiator for emitting light to the measurement area 40 in a vacuum state or in a near vacuum state; a scattered light detector 32 for detecting scattered light generated when the light is delivered to the measurement area 40; a discriminator 18 for determining whether or not a particle exists in the measurement area 40 by comparing the detection signal of the scattered light detector 32 and a predetermined discrimination threshold; a vacuum gauge 12 for measuring the pressure of the measurement area 40; and the threshold setting unit 16 for setting a discrimination threshold in accordance with the pressure of the measurement area 40.

Abstract: The present invention provides a particle counter capable of sensitively determining the contamination level of a light transmission window. The particle counter according to the present invention includes: a light source 281 for emitting light through a light incident window 24 to a measurement area 40 in a vacuum state or in an approximately vacuum state; a scattered light detector 32 for detecting scattered light through a detection window 30, the scattered light being generated when a light is delivered to the measurement area 40; a vacuum gauge 12 for measuring the pressure of the measurement area 40; a signal processor 13 for converting a detection signal of the scattered light into an electrical signal; and a contamination level determiner 19 for determining the contamination level of the transmission window from the time average of the electrical signal and the pressure.