69 results about "Ion pump" patented technology

The invention relates to a magneto-optical trap device for gravity measurement, wherein a magneto-optical trap capture area is provided on the upper part in a vacuum cavity, and an interference area and a detection area are provided on the lower part in order; a rubidium source is connected to a rubidium source angle valve, and the rubidium source angle valve and an ion pump are respectively connected by means of sealing to two obliquely arranged glass pipelines outside the vacuum cavity; a Raman mirror is set directly below the vacuum cavity; a fluorescence collection device is set at a horizontal position corresponding to the detection area outside the vacuum cavity, and two photodetectors are set at the outer side of the fluorescence collection device; first, second and third capture light are at an angle of 120 degrees in the same horizontal plane and are irradiated at the magneto-optical trap capture area in the horizontal direction; a composite beam is respectively composed of the lights at four frequencies including the capture light, detection light, Raman light and stop light in the vertical direction, wherein the capture light is reflected by the Raman mirror to form fourth and fifth capture lights, and five capture lights and a pair of reverse Helmholtz coils form a magneto-optical trap. The device can make the gravity head sensitive head compact in structure and reduced in size.

The invention relates to an ionizing pump stage, in particular for a vacuum pump, comprising an inlet for gas entering into the pump stage; an ionizing section communicating with the inlet in a gas-conductive manner and an ionizing device for ionizing the gas entered into the ionizing section; an acceleration device for accelerating the ionized gas present in the ionizing section in the conveying direction; and a neutralizing section following the ionizing section in the conveying direction and communicating with the ionizing section in a gas-conductive manner and a neutralizing device for the electrical neutralizing of the ionized gas entering into the neutralizing section.

The invention relates to an ultrahigh vacuum system, in particular to an ultrahigh vacuum acquisition system and method for experimental preparation of ultra-cold atoms and molecules, and solves a problem that the vacuum degree of an existing ultrahigh vacuum system is not high enough. The ultrahigh vacuum acquisition system for experimental preparation of the ultra-cold atoms and molecules comprises a first vacuum chamber, a second vacuum chamber, a third vacuum chamber, a fourth vacuum chamber, a first titanium sublimation pump, a second titanium sublimation pump, a first sputtering ion pump, a second sputtering ion pump, a third sputtering ion pump, a first angle valve, a second angle valve, a first turbo molecular pump, a second turbo molecular pump, a first ion gauge, a second ion gauge, a third ion gauge, an inflation valve, a nitrogen source, an alkali metal source, a first gate valve, a second gate valve, a Zeeman slower and a three-way pipe. The system and the method are applicable to experimental preparation of the ultra-cold atoms and molecules.

The invention discloses a small cold atomic clock device and method for a time keeping system. A two-dimensional magneto-optical trap is arranged in the atomic beam emitting direction of an atomic furnace; an atomic beam emitted from the two-dimensional magneto-optical trap enters a three-dimensional magneto-optical trap through a collimating device; a magnetron microwave cavity is placed in the three-dimensional magneto-optical trap; after cold atom preparation, atomic groups enter the magnetron microwave cavity under the action of gravity; atomic groups pass through the magnetron microwave cavity and then enter an annular microwave cavity; atoms passing through the annular microwave cavity enter a population detection device; the population detection device is connected with an ion pump,the ion pump maintains the vacuum environment of the whole system, three layers of magnetic shielding cylinders made of permalloy materials are sequentially arranged outside the system, an optical shutter is further arranged between the three-dimensional magneto-optical trap and the annular microwave cavity, and cold atom loading and microwave excitation processes are allowed to be implemented inparallel. The cold atomic clock device has the advantages of compact structure, short working period and the like, and the cost and size of the cold atomic clock can be remarkably reduced.

The above-mentioned problem is solved by an ion pump (6) comprising a casing (1), a first electrode (2), a second electrode (3), a plurality of cylindrical magnets (4), and a connection part (5). The first electrode (2) is arranged inside the casing (1). The second electrode (3) is arranged on the outer circumference of the first electrode (2). The first electrode and the second electrode have different polarities. The cylindrical magnets (4) are arranged so as to surround the circumference of the second electrode (3). The plurality of cylindrical magnets (4) are arranged so as to surround the circumference of the second electrode (3). The plurality of cylindrical magnets (4) are arranged at intervals in the center axis direction of the casing (1).

An X-ray tube (1) comprising a cathode (3), an anode (5) and a further electrode (7) is proposed. Therein, the further electrode is arranged and adapted such that, due to impact of 'free electrons (27) coming from the anode (5), the further electrode (7) negatively charges to an electrical potential lying between a cathode's potential and an anode's potential. The further electrode (7) may be passive, i.e. substantially electrically isolated and not connected to an active external voltage supply. The further electrode (7) may act as an ion pump removing ions from within a primary electron beam (21) and furthermore also removing atoms of residual gas within the housing (11) of the X-ray tube (1). In order to further increase the ion pumping capability of the further electrode (7), a magnetic field generator (61) can be arranged adjacent to the further electrode (7).

The invention relates to the field of ultrahigh frequency vacuum electron devices, and discloses a high-voltage electrode structure used for an ionic pump. The high-voltage electrode structure comprises a grounding connecting cylinder and a standard high-voltage joint. The inner wall of one end of the grounding connecting cylinder is provided with internal threads cooperated with an ionic pump screwed joint. A connecting conductor end of the standard high-voltage joint is welded with a high-voltage terminal inner conductor. The outer periphery of the end of the high-voltage terminal inner conductor is provided with external threads cooperated with a binding post screw hole on the end of the ionic pump screwed joint. The standard high-voltage joint and the other end of the grounding connecting cylinder are in interference fit. The high-voltage electrode structure used for an ionic pump is firm in connection, good in security, simple in structure, and easy in processing and assembling.

The invention provides an ARPES (angle resolved photoemission spectroscopy) vacuum system, a vacuum safety interlocking system and a vacuum safety interlocking method. The ARPES vacuum system comprises a vacuum pipeline; a mechanical fore pump, a first vacuum gauge, a first vacuum fore valve, a second vacuum fore valve, a third vacuum fore valve, a first molecular pump fore valve, a first molecular pump, a second molecular pump fore valve, a second vacuum gauge, a second molecular pump, a molecular pump valve, an ion pump valve, an ion pump, a sample preparation chamber and an analysis chamber; a chamber valve is arranged between the sample preparation chamber and the analysis chamber; the preparation chamber is connected with a third vacuum gauge and a fourth vacuum gauge; the analysis chamber is connected with a fifth vacuum gauge and an adsorbing pump; an adsorbing pump valve is arranged between the analysis chamber and the adsorbing pump; a condensing pump valve, a condensing pumpand a condensing pump gate valve are arranged sequentially on the vacuum pipeline between the first molecular pump and the analysis chamber.

The invention relates to vacuum coating experimental equipment, specifically a high-temperature and high-vacuum annealing furnace, in which an ion pump, an annealing chamber cavity, a sampling chamber cavity, and a molecular pump are connected in sequence, and the molecular pump is connected to a mechanical pump through a pipeline. Between the pump and the cavity of the annealing chamber, between the cavity of the annealing chamber and the cavity of the sampling chamber, and between the cavity of the sampling chamber and the molecular pump, there are flap valves; the cavity of the annealing chamber is equipped with a fixed upper heater And the lower heater that can be lifted up and down, the cavity of the sampling chamber is equipped with a multi-layer sample library that can be lifted up and down, and a manual transfer rod manipulator is installed on one side of the cavity of the sampling chamber. The invention can quickly complete the sample exchange with the annealing chamber under vacuum conditions, ensuring that the annealing chamber is always in a high vacuum state. In the high-temperature and high-vacuum annealing furnace of the present invention, the cold-state ultimate vacuum degree of the annealing chamber can reach 10 ‑8 Pa ultra-high vacuum, when heated at 1600°C, the thermal vacuum degree can reach 10 ‑ 6 Pa, and it can realize the long-term heat preservation annealing of the sample not higher than 1600 °C.

The invention discloses a GSA and ESA dual-wavelength pumped thulium-doped laser, which is composed of a GSA pump source, an ESA pump source, a pump light beam combiner, an input mirror, a thulium-doped laser medium and an output mirror. GSA is the ground state absorption, corresponding to the thulium-doped laser medium 3 h 6 → 3 h 4 transition, ESA is excited state absorption, corresponding to 3 f 4 → 3 h 4 transition. Pumped by a GSA pump source, based on 3 h 6 → 3 h 4 The ground state absorption caused by the transition will change the Tm in the thulium-doped laser medium 3+ ion pumping to 3 h 4 Energy level, realize the first layout of the number of particles in this energy level. At the same time, the cross-relaxation process between thulium ions will further realize the metastable state 3 f 4 The particle population layout of the energy levels. Pumped by the ESA pump source, using 3 f 4 → 3 h 4 The excited state absorption caused by the transition will 3 f 4 The number of particles accumulated on the energy level is precisely pumped to 3 h 4 energy level, achieve 3 h 4 The second layout of the number of energy level particles. The scheme of pumping thulium-doped laser medium by GSA and ESA dual-wavelength that the present invention proposes can effectively improve 3 h 4 → 3 h 5 The layout of the number of particles on the energy level of the transition increases the laser output power in the 2.3-2.5μm band.

The invention discloses a novel sputter ion pump with a positive electrode barrel array. The novel sputter ion pump is characterized by comprising a shell; a gas inlet is formed in the top of the shell, magnets are mounted on the left side and the right side of the shell, the positive electrode barrel array is mounted inside the shell in an insulation manner, negative electrode plates are arrangedon two sides of the positive electrode barrel array, a high-voltage electrode and the gas inlet are fixedly assembled, positive potential of the high-voltage electrode is connected with the positiveelectrode barrel array, zero potential of the high-voltage electrode is connected with the two negative electrode plates, chambers for exhausting gas are formed between the negative electrode plates and the positive electrode barrel array, the positive electrode barrel array comprises a plurality of groups of positive electrode barrels, the radiuses of the positive electrode barrels are increasedalong with decrease of the distances from the positive electrode barrels to the gas inlet, the heights of the positive electrode barrels are decreased along with decrease of the distances from the positive electrode barrels to the gas inlet, and the sizes of gaps between the upper and lower surfaces of the positive electrode barrels and the negative electrode plates are increased along with decrease of the distances from the positive electrode barrels to the gas inlet; the radiuses of the positive electrode barrels are decreased along with increase of the distances from the positive electrodebarrels to the gas inlet, the heights of the positive electrode barrels are increased along with increase of the distances from the positive electrode barrels to the gas inlet, and the sizes of the gaps between the upper and lower surfaces of the positive electrode barrels and the negative electrode plates are decreased along with increase of the distances from the positive electrode barrels to the gas inlet. The novel sputter ion pump has the advantages that the gas exhaust speed in unit volume of the novel sputter ion pump can be greatly increased, and the novel sputter ion pump can keep working at the high exhaust speed even in ultrahigh-vacuum environments.

The invention relates to a sputter ion pump magnetic circuit structure and a sputter ion pump. The sputter ion pump magnetic circuit structure comprises an air exhaust assembly, a pair of ladder-typemagnet yokes, magnets and a lower magnet yoke, wherein the magnets are disposed above the two ends of the lower magnet yoke; the ladder-type magnet yokes are fixed to the upper surfaces of the magnets; each ladder-type magnet yoke has a wide bottom and a narrow top; the vertical surfaces of the pair of ladder-type magnet yokes are oppositely disposed; and the air exhaust assembly is fixed betweenthe two ladder-type magnet yokes. As the distance to the magnets increases, the thicknesses of the ladder-type magnet yokes gradually decrease to shrink the magnetic lines of force therein such that auniform magnetic field with constant magnetic induction intensity is formed in the space of the air exhaust assembly. In the magnetic circuit structure, the magnet yokes constrain a large number of magnetic lines of force, and the magnetic induction intensity at the axis of an anode cylinder in the air exhaust assembly with the magnet yokes is greater than that of the air exhaust assembly withoutthe magnet yoke. Thus, the sputter ion pump magnetic circuit structure is high in magnetic field utilization rate, obvious in improvement effect, and simple in structure, reduces the volume and the weight of the pump and reduces processing cost.