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36 articles

The explosion-proof radiation measuring instrument adopts a physical design that is “explosable on the inside and insensitive on the outside”.

At petrochemical, nuclear fuel processing or emergency response sites, the environment often contains two deadly threats at the same time: invisible ionizing radiation, and flammable gases that may be detonated by sparks or high temperatures at any time. Once ordinary radiation detection equipment generates a weak arc, the original design intention of the explosion-proof radiation measuring instrument is to weave the two logical lines of "detection sensitivity" and "physical isolation" into the same protective shell. Its working principle can be broken down into three levels. The first layer is the detection core: scintillator detectors or semiconductor detectors are usually used inside the instrument.

Typical application scenarios of long pole radiation measuring instruments

In the nuclear industry, radiological medicine or environmental monitoring, workers often face a dilemma: the dose rate near the radiation source is high, and direct proximity to the reading may bring unnecessary exposure risks; but if the distance is too far, it is difficult for ordinary hand-held instruments to accurately capture the signal. The long pole radiation measuring instrument is a special device designed to resolve this contradiction. The core structure of the long-rod radiation measuring instrument consists of three parts: the probe, the telescopic rod and the main unit. The probe usually uses a scintillator detector or a Geiger-Miller counter. When radiation particles (such as gamma photons or beta particles) enter the detector

The working principle of the thermoluminescent dose box is not complicated

At nuclear power plants, hospital radiology departments or industrial inspection sites, workers often wear an inconspicuous small box. It makes no sound or light, but can record the radiation dose received by the wearer. This device is a thermoluminescent dosing box. Its working principle is not complicated, but it cleverly takes advantage of the "trap" phenomenon in solid state physics. The core of a thermoluminescent dose box is a special crystal, usually lithium fluoride or calcium sulfate doped with impurities. When ionizing radiation passes through a crystal, it knocks electrons out of atoms, forming electron-hole pairs. These electrons will not disappear immediately

The measurement process of thermoluminescent dose tablets is a process of "reading" stored information.

In the field of nuclear technology applications and radiation protection, there is a compact device that does not rely on batteries or complex circuits, but can faithfully record the radiation dose in the environment. The core component of this device, the thermoluminescent dose tablet, has a working principle closely related to the phenomenon that certain minerals in nature release photons after being heated. The working basis of the thermoluminescent dosimeter is the "trap energy level" theory in solid state physics. The main material is usually lithium fluoride or aluminum oxide crystal doped with specific impurities (such as lithium, magnesium, titanium, etc.). During crystal growth, impurity atoms replace

Thermoluminescence dose readers have several practical advantages in the field of radiation monitoring

In the field of radiation protection and dose monitoring, there is a device that can heat materials to release stored radiation information - this is a thermoluminescence dose reader. Its working principle is based on a physical phenomenon called "thermoluminescence", and the special advantages of this technology have made it applicable in fields such as personal dose monitoring, environmental radiation measurement, and medical radiation therapy. The core working object of the thermoluminescent dosimeter is the thermoluminescent dosimeter, which is usually made of crystal material doped with specific impurities (such as lithium, magnesium, titanium, etc.). When these materials

Five-step screening method: A guide to key performance and applicable scenarios of radiation alarm devices

In the fields of medical radiation, industrial non-destructive testing and environmental monitoring, radiation safety has always been an insurmountable red line. A reliable radiation alarm is not only a "sentinel" to ensure personnel safety, but also the technical cornerstone of compliance operations. Faced with a dazzling array of products on the market, how to accurately select them? This article will take the KR5200 online radiation alarm from KARRAY (Shanghai) Technology Co., Ltd. (hereinafter referred to as "KARRAY Technology") as an example, and combined with its product characteristics, will break down the purchasing logic of the radiation alarm for you. The first step: lock the core of the detector - GM tube

Analysis of core parameters of personal dose alarm: from measurement principle to purchasing points

In high-risk operating environments such as the nuclear industry, medical radiation, and non-destructive testing, personal dose alarms are the "personal guards" to ensure the safety of workers. Faced with the dazzling array of products on the market, how to scientifically choose an instrument with reliable performance and adaptable functions has become a skill that practitioners must master. This article will take the MKS-05 multifunctional personal dose alarm meter from Karray (Shanghai) Technology Co., Ltd. (Karray) as an example, combined with its technical parameters, to provide an in-depth analysis of the key points for purchase. 1. Measurement Principle: From “Perception” to “Early Warning” Individual

Thermoluminescence personal dosimeter has become an indispensable and important tool in modern radiation protection system

Thermoluminescent personal dosimeters have become an indispensable tool in modern radiation protection systems due to their special physical principles and performance advantages. As materials science advances (such as the development of new phosphors), its sensitivity and application range are expected to be further expanded. Analysis of the basic working principle of the thermoluminescent personal dosimeter: 1. Electron excitation and trap capture: When the thermoluminescent material is exposed to ionizing radiation, its internal electrons absorb energy and jump from the valence band to the conduction band, forming free electrons and holes. Some electrons are trapped by "trap" energy levels in the crystal structure during migration.

Maintenance methods for online radiation alarms

With its intelligent design and multi-scenario adaptability, online radiation alarms have become an indispensable tool for radiation safety protection. They show advantages in reducing personnel exposure risks and improving emergency response efficiency. They use Geiger-Miller (GM) counting tubes, which can accurately capture weak radiation signals, monitor radiation levels in real time, detect radiation anomalies in a timely manner, and take timely measures. It supports three alarm modes of sound, light and vibration to avoid the risk of missed alarms. The graphic dot matrix LCD display and humanized input interface improve the convenience of operation and is equipped with a standard RS485 interface.

X-ray multifunctional quality inspection instrument produces high-resolution images

One of the advantages of X-ray multifunctional quality detectors is that they can be inspected without destroying the structure of the product, ensuring the functional integrity of the object being inspected. This is crucial for the inspection of key parts in the aviation, automotive and other industries, and can ensure quality and safety without affecting the subsequent use of the product. It can generate high-resolution images, finely display the details and complex structures inside the object, and even clearly observe tiny defects, such as small cracks, bubbles, etc., which is difficult to achieve with traditional visual inspection or other conventional inspection methods.

X-ray machine comprehensive tester is equipped with a variety of sensors and probes

The X-ray machine comprehensive tester is equipped with a variety of sensors and probes, such as the illumination probe for light output measurement, image intensifier and viewing box, and the current probe for non-invasive pipeline current measurement, etc., which can realize comprehensive testing of multiple performance indicators of the X-ray machine. It can non-destructively detect internal defects of objects with high accuracy and wide application range. It can detect tiny cracks, pores, inclusions and other defects, providing a strong guarantee for product quality control. Can be used to detect various types of X-ray equipment, including general power frequency X-ray generators and variable frequency X-ray high-voltage

Pay attention to these aspects when using CT dose detection phantom

CT dose detection phantom achieves accurate measurement by simulating the shape and tissue density of different parts of the human body. For example, the head phantom is approximately 16 cm in diameter to match the size of an adult head, and the body phantom is 32 cm in diameter to match the torso structure. Most of its materials are made of materials with radiation absorption properties similar to human tissue such as polymethylmethacrylate (PMMA) to ensure that the data is clinically representative; some models also inject sodium chloride solution into the internal cavity to further adjust the attenuation coefficient, thereby more realistically reflecting the dose distribution of different tissues. Embedded in the mold

Light field detection board is an important tool for quality control of radiotherapy equipment

The light field detection board is an important tool for quality control of radiotherapy equipment. Its working principle is based on sensitive response to radiation and optical imaging technology. When rays (such as X-rays, electron beams, etc.) generated by radiotherapy equipment are irradiated onto the detection plate, specific materials in the detection plate will interact with the rays. For different types of rays, the mechanisms of action are slightly different. Taking X-rays as an example, the fluorescent material in the detection plate will be excited and release visible light after being irradiated by X-rays. The intensity of these visible lights is related to the X-ray radiation

Basic knowledge of solid water phantom, all in one article

Solid water phantoms can quickly and easily replace traditional water tanks for routine detection of linear accelerator photon beams, greatly improving work efficiency. The phantom pieces made of this special material have high enough strength and will not stick together when stacked and stored. This means that there will be no debris during use, greatly improving the safety of use. It has good stability to changes in temperature and humidity, that is, its physical properties will not be affected by changes in environmental factors. This ensures accurate measurement results in different environments. Cavity sheet

Key points to note when selecting low-contrast detail detection phantoms

The selection of low-contrast detail detection phantoms requires comprehensive consideration of detection needs, application scenarios, technical parameters and standardization requirements. The following are the key selection points: 1. Select according to the detection object and purpose - Medical imaging system (such as CR/DR, angiography machine): - It is recommended to use PROMAM GOLD phantom, whose low-contrast detail panel size is 240mm × 180mm × 20mm, containing 256 grids (16 rows × 16 columns), which can quantify details and contrast. -Other special phantoms (such as 18 low contrast

The use of CT performance testing phantoms requires strict operating procedures.

The CT Performance Test Phantom is a tool used to evaluate and verify the performance of computed tomography (CT) equipment. It is usually made of a variety of materials and can simulate the different densities and structures of human tissue, thereby helping medical technicians detect key parameters such as image quality, resolution, and sensitivity of CT equipment. Its design fully takes into account the complexity and diversity of human tissue. It usually consists of multiple modules, each of which is specially designed for different performance indicators of CT equipment. For example, some modules contain high-density and low-density materials for measuring