About Lanzhou Institute of Physics

Lanzhou Institute of Physics

The Lanzhou Institute of Physics (LIP), known externally as the Lanzhou Academy of Space Technology, is the 510th Institute of the China Academy of Space Technology (CAST) and one of China's foundational space research organisations. Based in Lanzhou, the capital of Gansu Province in northwest China, it was established in 1962 as China's earliest professional institute engaged in vacuum science and technology research, and it joined CAST in 1968 as one of the first centres engaged in spacecraft research and development in the country. From that vacuum foundation, LIP has grown into a supplier of some of the most specialised hardware in the Chinese space programme: space electric propulsion systems that push satellites with ion beams, high-performance atomic clocks, space science exploration payloads, and the vacuum metrology standards against which China's spacecraft instruments are calibrated. CAST records that LIP has supplied a variety of key products to more than 100 Chinese spacecraft while keeping a record of 100 percent flight success — a claim that captures both the institute's reach and the reliability expected of its components.

Origins: from the Chinese Academy of Sciences to CAST

LIP began as the Lanzhou Institute of Physics of the Chinese Academy of Sciences, China's national scientific academy, and its founding in 1962 made it the country's earliest research institute majoring in vacuum science and technology. Vacuum expertise may sound narrow, but it is fundamental to spaceflight: every spacecraft operates in vacuum, is tested in vacuum chambers before launch, and carries instruments whose behaviour depends on the near-absence of air. In 1968, when the China Academy of Space Technology was established to lead China's satellite development, LIP became part of CAST — a relationship the institute and its partners consistently date to 1968. A Pfeiffer Vacuum cooperation announcement in 2017 described LIP as one of the founders of the Chinese Vacuum Society and a pioneer in vacuum technology in China, and as one of the first institutes in China directly engaged in satellite and spacecraft development. The institute's designation as the 510th Institute reflects CAST's numbering system, in which Beijing institutes carry 500-series numbers in the 501 to 508 range and out-of-Beijing units such as Lanzhou's 510th and Xi'an's institutes extend the sequence.

Location, scale and people

LIP is located in Lanzhou, Gansu Province, far from CAST's Beijing headquarters — a geographic spread typical of China's space industry, whose institutes were distributed across the country during its early decades. CAST states that LIP has nearly 1,800 employees across the central institute and affiliated companies, including one academician of the Chinese Academy of Engineering, and 58 high-level innovative talents represented by national academic and technology leaders and experts receiving special government allowance. The academician most publicly associated with the institute is Li Detian, chief scientist of Institute 510 and director of the State Key Laboratory of Vacuum Technology and Physics, whose lectures on vacuum technology and aerospace engineering applications summarise LIP's five core technological systems. In financial terms, CAST reported that in 2021 LIP achieved operating revenue of nearly 2.1 billion yuan and profit of 210 million yuan, presenting the figures as evidence of high-quality development. Since its foundation, the institute has been rewarded with more than 300 significant scientific research achievements, including 15 national science and technology awards, and has formulated 218 standards at various levels — standard-setting being a natural extension of its metrology role.

Vacuum science and metrology: the founding discipline

Vacuum technology and physics remain the institute's scientific core. LIP hosts the Key Laboratory of Vacuum Technology and Physics for National Defense Technology, described in CAST's fuller account as a national vacuum technology and physics key laboratory, together with a Ministry of Science and Technology vacuum metrology and international joint research centre for applied technology and the National Defense Industry Vacuum Metrology Station recorded in the institute's profile. A major review by LIP scientists Detian Li and colleagues, published in Space: Science and Technology in 2021, explains the work: LIP has been dedicated to payloads and space-related vacuum technology for decades and has widely participated in China's space programmes, developing payloads covering total and partial pressure measurement, vacuum and pressure leak detection and standard gas inlet technology, along with the calibration standards that guarantee their precision. Since 1962, the review notes, LIP has built a family of apparatuses covering China's vacuum metrology requirements for national defence, aerospace and civil industry, traced to the standards of the National Institute of Metrology of China and checked through intercomparisons with Germany's national metrology institute, PTB. Its static expansion vacuum standards reach measurement ranges extending to ultra-high vacuum, developed in 2008 to meet aerospace and other high-technology needs.

Space electric propulsion and the LIPS systems

The product line that has brought LIP the widest public attention is space electric propulsion. CAST lists space electric propulsion systems first among the institute's key products and names the LIPS series of electric propulsion systems among its original space engineering achievements, several of which filled domestic technology gaps. Electric propulsion uses electrical energy, typically from solar arrays, to accelerate propellant ions to very high exhaust velocities, producing small thrust with exceptional fuel efficiency. LIP's best-documented application is the ion thruster for Shijian-13, China's first high-throughput communications satellite. Xinhua reporting in April 2017 recorded that the Lanzhou Institute of Physics started developing the ion thruster for Shijian-13 in March 2011 and finished development in April 2016, and that Shijian-13, launched from Xichang, was the first Chinese satellite propelled by electricity and the first time China applied electric propulsion on a communications satellite. Institute director Zhang Weiwen explained that the thruster converts solar energy into jet energy for manoeuvres, reducing the chemical fuel a satellite must carry, while Zhang Tianping, general manager of the institute's electric propulsion business division, noted the technology's precise positioning capability. Reporting at the time estimated efficiency gains of as much as ten times over chemical propulsion, with corresponding benefits for satellite life and launch weight. LIP researchers have also published on air-breathing electric propulsion, a frontier concept for spacecraft operating at very low altitudes.

Atomic clocks and time-frequency work

High-performance atomic clocks are another listed LIP product line, sitting at the intersection of its vacuum expertise and precision physics: atomic frequency standards depend on atoms held and interrogated in high vacuum. Academician Li Detian's summary of the institute's core systems includes atomic frequency standard electro-vacuum technology alongside vacuum testing and metrology, electric propulsion vacuum plasma, space environmental effects and surface engineering. Precise onboard clocks underpin satellite navigation, communications timing and scientific measurement, and a spacecraft clock must survive launch vibration and years of radiation while holding accuracy that ground clocks achieve in controlled laboratories. LIP's inclusion of high-performance atomic clocks among the key products it has supplied to more than 100 spacecraft places it among the small number of Chinese institutes able to build flight-grade timekeeping hardware. The work also connects to the institute's metrology identity: an organisation that maintains vacuum standards and publishes measurement science is well positioned to build instruments whose entire purpose is precise measurement in space.

Science payloads, detectors and exploration instruments

CAST credits LIP with space science exploration payloads among its key products and singles out two original achievements: high-precision space electric field detectors and a Mars particle energy analyser. Electric field detectors measure the charged-particle environment around a spacecraft, data that matters both for space weather science and for understanding the electrical environment in which the spacecraft itself operates. A particle energy analyser for Mars extends that measurement capability to interplanetary exploration, characterising the energetic particles a Mars-bound or Mars-orbiting spacecraft encounters. The vacuum measurement review adds further payload types flown on satellites, spaceships and space stations, covering total and partial pressure measurement, leak detection and standard gas inlet systems. A CAST news item from February 2016 illustrates the exploration connection concretely: scientists at the Lanzhou Institute of Physics developed a system to measure the leak rate of a vacuum environment for China's lunar exploration programme, so that lunar samples returned by the Chang'e-5 mission could be packed in a vacuum capsule preserving a Moon-like vacuum and protected from contamination and temperature extremes on the journey back to Earth. Chief scientist Li Detian explained that the accuracy of measuring the finest leak in the capsule would directly affect the research results obtained from the roughly two kilograms of samples.

Supporting product families

Around these headline lines, CAST lists a supporting portfolio that reflects LIP's role as a component supplier to the wider spacecraft industry: surface engineering products, DC-DC power supply products, aerospace pressure vessel products and aerospace mechanical and electrical products. Surface engineering — coatings and treatments that protect spacecraft materials against the space environment — grows directly from vacuum and surface science, and the institute codified its knowledge in the China Star Ship Material Space Effect Data Handbook. DC-DC power supplies convert and condition electrical power between spacecraft systems, small units on which larger payloads depend. Pressure vessels store gases for propulsion and life-support-related functions and must be qualified to aerospace standards. Mechanical and electrical products round out the catalogue. Individually these are unglamorous components; collectively they explain how one institute can have supplied key products to more than 100 spacecraft while maintaining, in CAST's accounting, a 100 percent flight success record — the products are numerous, specialised and embedded across many different vehicle types rather than concentrated in a single flagship spacecraft.

National programmes and research foundations

CAST states that over the past five decades LIP has been consistently and deeply involved in Chinese innovation-driven academic projects including the 973 Program — China's national basic research programme — and the Outstanding Youth Fund, among many other frontier basic research subjects. That involvement matters because LIP's technologies sit at the boundary between basic physics and engineering: vacuum measurement, plasma propulsion and atomic frequency standards all require fundamental research before they can become flight products. A 2024 review of space propulsion development in China co-authored by LIP's Geng Hai similarly surveys electric, chemical, nuclear and new-concept propulsion after more than 60 years of Chinese development, arguing for stronger basic research and top-level planning — the perspective of an institute whose flagship product, electric propulsion, took decades of laboratory work before its first communications-satellite application in 2017. Academician Li Detian's lectures make the same point for vacuum technology as a whole, describing it as a fundamental, critical and indispensable core technology supporting stable on-orbit operation of spacecraft, deep-space exploration missions and the future development and utilisation of space resources, with applications foreseen in deep-space exploration, extraterrestrial resource use and very low Earth orbit operations.

Publishing, standards and international cooperation

LIP's influence extends through China's technical literature. CAST records that the institute published the first edition of the Vacuum Design Manual, the China Star Ship Material Space Effect Data Handbook and the Vacuum Science and Technology book series, and that it issues Vacuum and Cryogenics, rendered in CAST's English text as the Vacuum and Low Temperature core journal, persistently promoting progress in Chinese vacuum science and technology. Its formulation of 218 standards at all levels reinforces that codifying role. Internationally, the clearest documented partnership is with Germany's Pfeiffer Vacuum: on 17 October 2017 the LIP-Pfeiffer Vacuum Joint Center for Vacuum Technology was established in Lanzhou, and in December 2017 the two sides signed a strategic cooperation agreement covering research and development of vacuum solutions for aerospace applications, vacuum metrology and vacuum calibration. For a defence-linked space institute, such a joint centre with a major European vacuum equipment manufacturer is a notable, publicly announced channel of technical exchange, centred precisely on the institute's founding discipline.

Strategic direction and significance

CAST summarises LIP's ambition in the institute's own strategic target: building a world-class technical institute of space physics and a world-class vacuum enterprise, developing along a path of high quality, high efficiency and high benefit, and seizing opportunities in civil-military industry development. The significance of the Lanzhou Institute of Physics within China's space programme is that it owns the invisible foundations on which visible missions depend. Rockets and spacecraft attract public attention, but satellites cannot be tested without vacuum facilities, cannot be navigated or timed without precision clocks, cannot hold station for fifteen years without efficient electric propulsion, and cannot return lunar samples uncontaminated without leak-tight vacuum engineering. By holding all of those capabilities in one institute — founded in 1962 on vacuum physics, absorbed into CAST in 1968, and supplier to more than 100 spacecraft with a 100 percent flight success record — LIP exemplifies the specialised-institute structure that underlies the Chinese space industry, in which deep competence in a single physical discipline becomes, over six decades, an indispensable national capability.