Short circuit in Large Hadron Collider is fixed

first_img Sign up for our daily newsletter Get more great content like this delivered right to you! Country Efforts to fix a short circuit in the world’s largest atom smasher, the Large Hadron Collider (LHC), have been successful, according to officials at the European particle physics lab, CERN, near Geneva, Switzerland.Engineers detected the short on 21 March as they prepared to restart the LHC—the 27-kilometer-long collider that in 2012 discovered the Higgs boson—after 2 years of repairs. That short was apparently caused by a wayward bit of metal inside the “diode box” in one of the superconducting dipole magnets that steer particles as they hurtle around the LHC. Now, engineers have succeeded in burning off the piece of metal by injecting 400 amps of current into the shorted circuit, to blow it a bit like you’d blow a fuse.”The progress is good. … The short has disappeared. We are back into what we would call more routine test phase now,” says Paul Collier, head of the beams department at CERN. Country * Afghanistan Aland Islands Albania Algeria Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Cote d’Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hungary Iceland India Indonesia Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea, Democratic People’s Republic of Korea, Republic of Kuwait Kyrgyzstan Lao People’s Democratic Republic Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao Macedonia, the former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Martinique Mauritania Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Norway Oman Pakistan Palestine Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Qatar Reunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Vietnam Virgin Islands, British Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe If all goes well, the LHC could be ready to run by this weekend. Before that can happen, engineers will need to retest the entire 6-kilometer circuit that powers the dipole magnets in the sector in which the short appeared—a process that will require at least a few days. Researchers will then need a few more days to prepare the whole machine for the beam. Before the short appeared, CERN officials had hoped to start circulating particles last week.The fix avoids a considerably longer shutdown. If initial attempts to obliterate the piece of metal had failed, engineers might have had to open up the machine to remove it, a step that could have added weeks or months to the schedule.”It’s a matter of days, now, before first beam, certainly not weeks,” Collier says. “Fingers crossed that nothing else goes wrong, of course.”center_img Email Click to view the privacy policy. Required fields are indicated by an asterisk (*)last_img

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