Tevatron smashes old luminosity records

During the last seven-day period, May 2-May 9, the Tevatron set several luminosity records and produced four of the top ten initial luminosity stores ever achieved. Those four stores are shown above (ribbons). The laboratory also broke the record for average integrated luminosity achieved during a single week.

Between Monday, May 2, and Monday, May 9, Fermilab achieved several luminosity records.

Four of the top ten initial luminosity stores were achieved last week, including store 8709, which set a record of 4.31 x 1032 cm-2s-1, or 431 µb-1/s, on May 3. The unit of measurement µb-1/s is roughly equivalent to 70,000 proton-antiproton collisions per second.

During the same week, the Accelerator Division also reached a new average integrated luminosity record for a single calendar week of 76.5 inverse picobarns. The achievement replaces the previous record of 73.1 inverse picobarns, which was set during the week of April 13-20, 2009.

Fermilab also exceeded the 168-hour floating-week integrated luminosity record of more than 81 inverse picobarns.

There are two ways to express the likelihood of collisions, or luminosity, during any particular store: peak luminosity, which describes the initial (and highest) luminosity in a store, and integrated luminosity, which describes how many total collisions are produced over the lifetime of that store.