cosmic ray (muon) detector

cosmic rays (Miu Zi) detector andagainstcosmic backgroundeliminationsystem (PCD-103)

cosmic raymuon detector (CRMD) is a particleprobedetector, canprobemeasure and observe the by-products of cosmic rays.

cosmic rays are high-energy, subatomic particles constantly bombard the earth's atmosphere from all directions. Today, scientists are working on new technological solutions to improve their knowledge in this area. Based onPMTPCD-103probedetectors are usedYu Miao Zi Tantest.

it can also be used in anti-cosmic background measurement systems, for example, added to any new or existing standard high-purity germanium (HPGe) in the counting system, includingCANBERRA / ORTEC / BSI. Completely independent protectionprobedetector/electronicis mounted directly on the lead shield. The system is directly connected toHPGeprobethe detector'sMCA GATEInterface, inputVETOsignal in casemeets and reduces background.

Why is it important to eliminate the cosmic background? The background of the gamma spectrum system has three main sources: terrestrial radiation, internal radiation, and cosmic radiation.

ground radiationK-40, uranium andthoriumis driven by the decay products and is greatly reduced by passive lead shielding.

internal radiation may come fromHPGeprobedetector components, but also from the sample itself, dueprobeenergy deposition in the detector is incomplete (scattering) and someprobedetector/caused by the shielding component itself. In many counting systems, the scattering component will appear, although in some cases the Compton suppression scheme can be applied to reduce this formbackground. Most detectors have been manufactured using selected materials to minimize the detector's exposure to radiationbackground. In order to further reduce thisbackgroundcomposition, the manufacturer provides cryostat options, such as remoteprobedetector cavityRoom(RDC) or ultra-lowbackground(ULB) materials. Cosmic radiation consists of high-energy charged particles (such as mesons) that originate outside the Earth. This formbackgroundradiation cannot be greatly reduced by passive lead shielding.it is omnidirectional, it is mainly vertical. Therefore, the protection detector is placed inHPGeon the detector's shield and equipped with anti-collision logic can eliminate most of the universeRay to background. In this case, the protectionprobedetector andHPGeprobein the detector at the same timeprobemeasured radiation can cause radiation fromHPGeprobedetector is discarded, thereby reducing the cosmic background contribution.