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Large High Altitude Air Shower Observatory （LHAASO）Passes National Acceptance

Large High Altitude Air Shower Observatory （LHAASO）Passes National Acceptance

The Large High Altitude Air Shower Observatory (LHAASO) project, one of China's major national scientific and technological infrastructure facilities, has successfully passed national acceptance and formally gone into operation. LHAASO is a facility focusing on cosmic ray observation and research. It was approved by the National Development and Reform Commission (NDRC) on Dec. 31, 2015. Jointly sponsored by the Chinese Academy of Sciences (CAS) and the People’s Government of Sichuan Province, the construction project was undertaken by the Chengdu Branch of CAS and the Institute of High Energy Physics (IHEP) of CAS. The construction of the main part of the facility began in 2017 and was completed in 2021. The LHAASO project passed an acceptance inspection by five professional teams organized by CAS that covered the following areas: technical performance, construction and installation, financial matters, equipment and assets, and records.

Chinese Space Telescopes Accurately Measure the Brightest Gamma-ray Burst Ever Detected

Chinese Space Telescopes Accurately Measure the Brightest Gamma-ray Burst Ever Detected

At 2 a.m. of March 29, 2023 (Beijing Time), the Institute of High Energy Physics (IHEP) of Chinese Academy of Sciences (CAS), together with some 40 research institutions worldwide, released their latest discoveries on the brightest Gamma-Ray Burst (dubbed as GRB 221009A) ever detected by human. With the unique observations made by two Chinese space telescopes, namely Insight-HXMT and GECAM-C, scientists were able to accurately measure how bright and how much energy released by this burst, which is the key to understand this historical event.

HEPS Achieves the First Electron Beam Accelerated to 500 MeV

HEPS Achieves the First Electron Beam Accelerated to 500 MeV

The first electron beam of the High Energy Photon source (HEPS) was accelerated to 500 MeV with better than 2.5 nC of bunch charge by the Linac on March 14, which was a key milestone of the HEPS project—HEPS beam commissioning had begun.

New Understanding of Betatron Oscillations Paves Way for Long-distance and High-energy Plasma-based Particle Accelerators

New Understanding of Betatron Oscillations Paves Way for Long-distance and High-energy Plasma-based Particle Accelerators

Chinese researchers have discovered the general rules of betatron oscillations applicable to long-distance plasma-based particle accelerators.

JUNO Holds 21st International Collaboration Meeting

JUNO Holds 21st International Collaboration Meeting

The 21st International Collaboration Meeting of the Jiangmen Underground Neutrino Observatory (JUNO) was held from Feb. 6–10, as a hybrid meeting with both in-person and online participation. About 200 scientists from Asia and Europe attended the meeting in Kaiping.

HEPS Booster Installation Completed

HEPS Booster Installation Completed

At the beginning of 2023, with the last shielded bellows connected in the tunnel, installation of the booster for the HEPS accelerators was completed. This means that the whole booster line has been linked up and is ready for inter-system commissioning.

China Spallation Neutron Source Builds Four New Instruments

China Spallation Neutron Source Builds Four New Instruments

China Spallation Neutron Source (CSNS) has successfully completed construction of four neutron instruments in recent days. They are: the Engineering Materials Diffractometer (EMD), the Very Small Angle Neutron Scattering instrument (VSANS), the Energy-Resolved Neutron Imaging instrument (ERNI) and the High energy Direct geometry inelastic neutron scattering spectrometer (HD).

650 MHz SRF Cavities with Ultrahigh Accelerating Gradient

650 MHz SRF Cavities with Ultrahigh Accelerating Gradient

Particle accelerators are essential tools for advancing our understanding of the fundamental building blocks of the universe. These devices use radio-frequency (RF) electric field to accelerate charged particles, such as electrons or protons, to extremely high energy, allowing scientists to study the interactions of these particles in ways that were previously unimaginable. One of the key components of particle accelerators is the superconducting radio-frequency (SRF) cavity, which generates the RF electric field to accelerate the particles.

First Results from LHAASO's Dark Matter Search Place Tighter Constraints on Dark Matter's Lifetime

First Results from LHAASO's Dark Matter Search Place Tighter Constraints on Dark Matter's Lifetime

Scientists from the Large High Altitude Air Shower Observatory (LHAASO) have presented roughly 1.5 years of observational data, calculating new limits on the lifetime of heavy dark matter particles that have masses between 10^5 and 10^9 giga-electron volts. The study, entitled “Constraints on heavy decaying dark matter from 570 days of LHAASO observations,” was recently published as a highlight letter in Physics Review Letter.

First Data Release from GECAM Mission

First Data Release from GECAM Mission

On Dec. 10, the second anniversary of the successful launch of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM), the first GECAM data release (DR1) was announced by the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences (CAS), the National Space Science Center (NSSC) of CAS, the National High Energy Physics Data Center (NHEPDC), and the National Space Science Data Center (NSSDC). DR1 contains a catalogue of 75 gamma ray bursts (GRBs) and detailed observational data that support scientific users conducting multi-wavelength and multi-messenger observations of GRBs. Following its footprint of releasing real-time burst messages, GECAM is advancing towards its second milestone of providing scientific services for all scientists.

News

Large High Altitude Air Shower Observatory （LHAASO）Passes National Acceptance
Large High Altitude Air Shower Observatory （LHAASO）Passes National Acceptance

The Large High Altitude Air Shower Observatory (LHAASO) project, one of China's major national scientific and technological infrastructure faciliti...

Chinese Space Telescopes Accurately Measure the Brightest Gamma-ray Burst Ever Detected
Chinese Space Telescopes Accurately Measure the Brightest Gamma-ray Burst Ever Detected

At 2 a.m. of March 29, 2023 (Beijing Time), the Institute of High Energy Physics (IHEP) of Chinese Academy of Sciences (CAS), together with some 40...

HEPS Achieves the First Electron Beam Accelerated to 500 MeV
HEPS Achieves the First Electron Beam Accelerated to 500 MeV

The first electron beam of the High Energy Photon source (HEPS) was accelerated to 500 MeV with better than 2.5 nC of bunch charge by the Linac on ...

New Understanding of Betatron Oscillations Paves Way for Long-distance and High-energy Plasma-based Particle Accelerators
New Understanding of Betatron Oscillations Paves Way for Long-distance and High-energy Plasma-based Particle Accelerators

Chinese researchers have discovered the general rules of betatron oscillations applicable to long-distance plasma-based particle accelerators.

JUNO Holds 21st International Collaboration Meeting
JUNO Holds 21st International Collaboration Meeting

The 21st International Collaboration Meeting of the Jiangmen Underground Neutrino Observatory (JUNO) was held from Feb. 6–10, as a hybrid meeting ...

HEPS Booster Installation Completed
HEPS Booster Installation Completed

At the beginning of 2023, with the last shielded bellows connected in the tunnel, installation of the booster for the HEPS accelerators was complet...

China Spallation Neutron Source Builds Four New Instruments
China Spallation Neutron Source Builds Four New Instruments

China Spallation Neutron Source (CSNS) has successfully completed construction of four neutron instruments in recent days. They are: the Engineerin...

650 MHz SRF Cavities with Ultrahigh Accelerating Gradient
650 MHz SRF Cavities with Ultrahigh Accelerating Gradient

Particle accelerators are essential tools for advancing our understanding of the fundamental building blocks of the universe. These devices use rad...

First Results from LHAASO's Dark Matter Search Place Tighter Constraints on Dark Matter's Lifetime
First Results from LHAASO's Dark Matter Search Place Tighter Constraints on Dark Matter's Lifetime

Scientists from the Large High Altitude Air Shower Observatory (LHAASO) have presented roughly 1.5 years of observational data, calculating new lim...

First Data Release from GECAM Mission
First Data Release from GECAM Mission

On Dec. 10, the second anniversary of the successful launch of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECA...

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