Nuctech Company Limited

Tsinghua University

Jianping Chang

Yuanjing Li

Qingjun Zhang

Zhiqiang Chen

Ziran Zhao

Yinong Liu

Xiang Zou

Yaohong Liu

Qiufeng Ma

Huishao He

Weiping Zhu

Yanchun Wang

Song Liang

Yan Zheng

Wenjian Zhang

Yongqiang Wang

Shiping Cao

Junxiao Wang

Shaoji Mao

Shuqing Zhao

Yulan Li

Linxia Tan

Xianghua Li

Li He

Hong Li

Shuwei Li

Nan Bai

Haijun Yu

Lifeng Sun

Shuqiang Dong

Xingliang Zhai

Hongyan Wei

Xiuxia Li

A cryostat includes a room temperature vessel, a low temperature vessel, and a refrigeration mechanism. The room temperature vessel includes a room temperature tank, an outer neck tube and a sealing head. The low temperature vessel includes a low temperature tank, an inner neck tube and a liquefaction chamber. The liquefaction chamber corresponds to the first opening and passes through the first opening. The refrigeration mechanism includes a device panel and a refrigeration device. The device panel is disposed on the sealing head. The refrigeration device includes a body and a cold finger. The body is disposed at the device panel. The cold finger is connected with the body and extends into the liquefaction chamber.

Cryostat

A detection apparatus and a detection method are disclosed. In one aspect, the detection apparatus includes a sampling device for collecting samples to be checked. It further includes a sample pre-processing device configured to pre-process the sample from the sampling device. It further includes a sample analyzing device for separating samples from the pre-processing device and for analyzing the separated samples. The detection apparatus is miniaturized and highly precise, and is capable of quickly and accurately detecting gaseous phase or particulate substances, and it has applications for safety inspections at airports, ports, and subway stations.

Detection apparatus and detection method

A darkroom type security inspection apparatus and a method of performing an inspection using the darkroom type security inspection apparatus. An apparatus includes a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing include: a sample collecting unit configured to collect a sample, a conveyor unit, and a X-ray detection unit to detect a position of the objected to be inspected, wherein the X-ray detection unit is configured to determine the position of the objected to be inspected within the sampling assembly so that the object to be inspected together with the conveyor unit is conveyed to an expected position; and a sample processing assembly, wherein the assemblies disposed inside the housing are communicated by fittings or connectors.

Darkroom type security inspection apparatus and method

The present invention provides a method for forming a sensitive film for neutron detection, wherein the sensitive film is formed by electrophoresis coating, the liquid used for electrophoresis coating includes neutron sensitive material, electrophoresis paint and deionized water, and the neutron sensitive material isB single substance,B compound or mixture containingB. The sensitive film for neutron detection has the high detection efficiency because of the high content ofB. The sensitive film for neutron detection has the uniform and stable film thickness, and excellent consistency. The production efficiency and the cost of the sensitive film are improved.

Sensitive film for neutron detection and method for forming the same

The present invention discloses darkroom type security inspection apparatus and method. An apparatus comprises a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing are communicated by fittings or connectors and comprises: a sampling assembly comprising a sample collecting unit and a conveyer unit configured to convey an object to be inspected into the sample collecting unit; a sample processing assembly configured to concentrate and analyze the sample; and, an inspecting assembly configured to inspect composition of the sample by means of a gas chromatographic-ion mobility spectrometer (GC-IMS) or a separated ion mobility spectrometer (IMS). The security inspection apparatus of the present invention can perform the sampling easy, rapidly and effectively and perform the inspection accurately and rapidly without destroying and unpacking an object to be inspected, and thus is suitable for requirements of on-site rapid inspection of forbidden items in the airport, customs and the likes.

A sample injection device for sample collection and thermal desorption includes: a sample collection structure; a piston type adsorber having an adsorption cavity communicating with the sample collection structure; a piston cylinder defining a piston chamber accommodating the adsorber and communicating with the adsorption cavity; a thermal desorption chamber communicating with the adsorption cavity and the piston chamber; and a pump configured to pump a sample diffused in an ambient gas into the adsorption cavity through the sample collection structure and the piston chamber; the adsorber is movable between a sample collecting position where the adsorption cavity is outside the thermal desorption chamber and adsorbs the sample collected by the sample collection structure and a sample desorbing position where the adsorption cavity is inside the thermal desorption chamber so that the adsorbed sample is thermally desorbed in the thermal desorption chamber.

Sample injection device and method for sample collection and sample thermal desorption, and trace detection apparatus

A sampling device and a gas curtain guide are disclosed. In one aspect, the sampling device includes a chamber body. The chamber body includes a sample inlet, located at a first end of the chamber body, configured for suction of a sample. The chamber body further includes a sample outlet, located adjacent to a second end opposite to the first end of the chamber body, configured to discharge the sample. The chamber body further includes a gas inflation inlet, in a wall of the chamber body, configured to introduce a swirl gas flow into the chamber body. The chamber body further includes a gas exhaust opening configured to discharge gas so as to, together with the gas inflation inlet, generate a tornado type gas flow in the chamber body, which moves spirally from the first end to the second end of the chamber body.

Sampling device and gas curtain guide

A sample introduction device comprises a sampling unit, a gas suction pump, adsorption units, a piston cylinder and a desorption cylinder that comprises a desorption chamber, a carrier-gas inlet, a split/purge vent and an analyzer nozzle communicating with the desorption chamber. A heating film and a temperature sensor are provided on outer wall of the desorption cylinder. The piston cylinder above the desorption cylinder comprises two piston chambers, each of which is provided with the adsorption unit and in communication with the desorption chamber. The piston cylinder comprises a sample-gas inlet connected to the sampling unit and a gas-suction-pump orifice connected to the gas suction pump, each of which can communicate with both piston chambers. Each adsorption unit comprises an adsorption cylinder-like screen for holding adsorbents and a piston rod slidably mounted in the piston chamber. Each adsorption cylinder-like screen can simultaneously communicate with the sample-gas inlet and gas-suction-pump orifice.

Sample introduction device

The invention discloses a safety inspection detector and a goods safety inspection system. The safety inspection detector at least comprises a circuit board, a first housing, a second housing, a detection module and a connecting interface. The detection module and the connecting interface are mounted on the circuit board. The first housing is pressed and connected to a first surface of the circuit board, and the second housing is pressed and connected to a second surface of the circuit board. The first housing and the second housing can hermetically wrap the detection module and electronic devices on the circuit board, but bypass the connecting interface to realize leading-out and connection with related interconnected cables by utilizing the connecting interface. The housings can be used for sealing and protecting sensitive electronic devices in the detector, thus being moisture proof and preventing interference.

Safety inspection detector and goods safety inspection system comprising sealing material filled between an opening on a housing and the end portion of a detection module

A method for processing a ceramic scintillator array, characterized in that, comprising the following steps: (a) forming, in a first direction, a predetermined number of straight first-direction through-cuts which are parallel to each other and spaced from each other on a scintillator substrate by using laser; (b) adequately filling the first-direction through-cuts with an adhesive and solidifying the adhesive; (c) forming, in a second direction. a predetermined number of second direction through-cuts which are parallel to each other at a predetermined interval on the scintillator substrate by using laser, wherein the second direction is perpendicular to the first direction; and (d) adequately filling the second direction through-cuts with the adhesive and solidifying the adhesive bond.

Method for processing ceramic scintillator array

The present disclosure is directed to a rapid process for the preparation of gadolinium oxysulfide having a general formula of GdOS, referred to as GOS, scintillation ceramics by using the combination of spark plasma primary sintering (SPS) and hot isostatic pressing secondary sintering.

[object Object]

The present invention discloses a gas analyzing apparatus and a sampling device. The gas analyzing apparatus includes a sampling device and an ion mobility spectrum analysis device. The sampling device includes a multi-capillary column and a temperature control system. The ion mobility spectrum analysis device is adapted for analyzing a gas leaded-in by the sampling device and includes a reaction cavity for reaction between sample molecules and reaction ions, the cavity having a sampling opening for leading-in of the gas. An outlet end of the multi-capillary column is inserted directly into the cavity of the ion mobility spectrum analysis device through the sampling opening of the ion mobility spectrum analysis device.

Gas analyzing apparatus and sampling device

The present disclosure is directed to a low cost sintering process for the preparation of gadolinium oxysulfide having a general formula of GdOS, referred to as GOS, scintillation ceramics, comprising uniaxial hot pressing primary sintering and hot isostatic pressing secondary sintering.

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Beijing, China

Jianping Chang