India Built 7,080 Magnet Jacks and 1,762 Corrector Magnets for the Large Hadron Collider, and CERN Set Its 2026 Contribution at 18.9 Million Swiss Francs

India supplied 7,080 precision jacks to support the Large Hadron Collider’s dipole magnets, 1,146 sextupole corrector magnets, 616 octupole-decapole corrector magnets (1,762 corrector magnets in all), 5,500 quench-heater protection systems and 1,435 local protection units, according to a 2007 paper by the Indian laboratories that built them. On 16 January 2017 India became an Associate Member State of CERN, the European particle physics laboratory near Geneva. CERN’s scale of contributions for 2026 sets India’s payment for the year at 18,906,850 Swiss francs.

What the Indian laboratories made

The 2007 paper, written by engineers at the Raja Ramanna Centre for Advanced Technology (RRCAT) in Indore and the Bhabha Atomic Research Centre (BARC) in Mumbai, lists the deliveries in a table. Beyond the items above it names two 50,000-litre liquid nitrogen tanks and control electronics for 70 circuit breakers of the machine’s energy-extraction system. CERN Courier added in 2008 that the circuit breakers came from Russia and that India was responsible for their electronics.

RRCAT was the lead Indian laboratory. According to the paper, BARC and the Electronics Corporation of India Ltd (ECIL) worked on the protection systems and power supplies, and BARC, the Variable Energy Cyclotron Centre (VECC) in Kolkata, IGCAR and RRCAT supplied engineers and physicists for magnet testing. The tally includes 100 man-years of help testing superconducting dipole magnets and 20 man-years of hardware commissioning. CERN Courier reported that more than 90 qualified Indian personnel from four establishments had rotated through the magnet test hall at CERN, each for a year, since about 2002.

The payment was in kind. The 1996 protocol valued India’s hardware and manpower at 34 million Swiss francs (US$25 million at 1994 rates), and the paper says the figure was later raised to 60 million. Half counted as India’s contribution to the LHC. The other half went into an “Indian Fund” that paid for Indian scientists’ stays at CERN and for some costs in foreign exchange.

From a 1991 agreement to a seat in the Council room

Indian physicists from the Tata Institute of Fundamental Research (TIFR) have worked on CERN experiments since the 1960s, CERN says, and RRCAT delivered hardware for the earlier LEP collider in the 1990s. The Department of Atomic Energy (DAE) and CERN signed a cooperation agreement in 1991. In 1996 India’s Atomic Energy Commission agreed to help build the LHC, to contribute to the CMS and ALICE experiments and to support the computing grid.

CERN dates India’s observer status on the Council to 2002. The DAE’s own 2016 release says 2003. India applied for associate membership in 2015. The DAE says the CERN Council adopted the enabling resolution on 15 September 2016, and that its chairman Sekhar Basu and CERN’s Director-General Fabiola Gianotti signed the agreement at the DAE office in Mumbai on 21 November 2016. It took effect on 16 January 2017, after India notified CERN that its internal approvals were complete.

CERN Courier lists what the status gives: a place at Council meetings and its committees, eligibility for Indian scientists to hold CERN staff posts, and a route for Indian companies to take part directly in CERN projects. In the same report Basu said associate membership would enhance the participation of young scientists and engineers.

What the 2026 bill and the headcount show

CERN’s finance pages give India’s 2026 contribution as 18,906,850 Swiss francs, in 2026 prices, under revised calculation arrangements the Council adopted in December 2025. The page gives no other detail on how the figure was reached.

CERN’s personnel statistics count people two ways. At 31 December 2025, 482 of the 12,639 users in its tables were Indian nationals: 200 on CMS, 106 on ALICE, 83 on ATLAS, 21 on LHCb and the rest across smaller programmes. Counted by the country of the user’s home institute instead, India had 158. The two tables measure nationality and institute location, so they do not count the same people.

The detectors with Indian parts

ALICE, the experiment built to study quark-gluon plasma, the state of matter made in lead-ion collisions, carries two Indian contributions that the sources describe in detail. A presentation by Bedanga Mohanty of the National Institute of Science Education and Research calls the Photon Multiplicity Detector a wholly Indian effort from design to commissioning: 48 modules with 221,184 gas cells, commissioned in August 2008 and decommissioned in December 2018. The same presentation says India has more than 125 members in ALICE, at institutes in Kolkata, Bhubaneswar, Chandigarh, Aligarh, Jammu, Guwahati, Indore and Mumbai.

The second is a chip. CERN Courier reported in 2004 that the Saha Institute of Nuclear Physics in Kolkata began designing MANAS, the front-end chip for ALICE’s forward muon spectrometer, in late 1997, with Semiconductor Complex Ltd in Chandigarh fabricating it. By January 2002, 1,500 pre-production chips had gone to collaborating institutes, and more than 100,000 were planned for delivery by January 2005.

On CMS the DAE says Indian scientists played a significant role and were named among those behind the Higgs discovery. The record can be checked. INSPIRE, the high-energy physics literature database, lists 2,900 authors on CMS’s 2012 Higgs paper, and 75 of them carry an Indian affiliation: 29 entries for the Tata Institute, 13 for Delhi University, 12 each for Panjab University and BARC, and 9 for the Saha Institute. The DAE adds that the Worldwide LHC Computing Grid has Tier-2 centres, the middle layer of the data-sharing network, at VECC in Kolkata and TIFR in Mumbai, and its November 2016 release reports 96 percent uptime.

Hardware built in India has reached top journals outside particle physics as well. The X-ray spectrometer on Pragyan, covered in our Chandrayaan-3 piece, produced soil readings published in Nature, and the piece on ISRO’s budgets sets out what the agency spends.

4 July 2012 and the word boson

On 4 July 2012, at a seminar at CERN, the ATLAS and CMS experiments each reported a new particle at about 125 to 126 GeV. ATLAS spokesperson Fabiola Gianotti described signs of it at the level of 5 sigma, the usual threshold for a discovery. CMS’s published paper gives a mass of 125.3 GeV, with uncertainties of 0.4 GeV statistical and 0.5 GeV systematic, and a local significance of 5.0 standard deviations.

Satyendra Nath Bose’s name sits in the second word of “Higgs boson”. MacTutor, the St Andrews biography archive, says Bose’s four-page 1924 paper on Planck’s law reached Einstein, who translated it into German and submitted it to the Zeitschrift für Physik, and that Dirac later coined “boson” for the particles that follow the statistics that grew from it. The Higgs boson is one of that class. The first word of its name is Peter Higgs’s, and Bose died in 1974, 38 years before the announcement.

What the machine has found since

The Higgs result became a measuring programme. In 2025 ATLAS reported 3.4 sigma evidence that the Higgs decays to two muons, a test of its coupling to a second-generation particle, using Run 3 data at 13.6 TeV combined with Run 2. That is evidence rather than an observation, which takes 5 sigma.

The last proton beam of Run 3 circulated on 27 June 2026, and CMS says Run 3 ended on 29 June. CERN Courier puts the integrated luminosity, the standard measure of collisions delivered, at nearly 550 inverse femtobarns since first collisions, against an original target of 300. CMS received 355 inverse femtobarns in Run 3 alone.

One detector’s results, and the next phase

Author lists do not show who led an analysis, so this article names only one set of results as coming from an Indian-built detector. Mohanty’s presentation lists two ALICE papers as Photon Multiplicity Detector results. The 2015 paper measured photons at forward angles in proton-proton collisions, and found the average photon multiplicity rose 37.2 percent at 2.76 TeV and 61.2 percent at 7 TeV, relative to 0.9 TeV, in the range 2.3 to 3.9 in pseudorapidity, a measure of angle from the beam line. The second, from 2023, covers proton-proton and proton-lead collisions at 5.02 TeV.

The next phase is the High-Luminosity LHC. CERN’s schedule from October 2024 puts the start of its operation, called Run 4, in June 2030, with stronger focusing magnets and crab cavities among the new equipment. CERN Courier gives the target as more than 3 inverse attobarns, about six times the data collected so far.