RACER IV was a component of some of the first
RACER was the second fusion-boosted fission device type incorporating the principles tested first with the BOOSTER in the
The RACER was developed in 1953 at Los Alamos, was DT gas-boosted, and used a TOM initiator for internal initiation.: 172 The boosting capsule was made of steel and was internally lined with copper, a standardisation derived from the Booster Ball: 258 tested in the Item test. Inside the capsule, the TOM initiator was nested with a caltrop-like steel mounting. This method of assembly of the TOM initiator was known as sealed initiator, doing away with the mounting bracket employed in earlier pure-fission designs.
Testing and finalisation
Several RACER cores were proof-fired during
Unpredictability and discontinuation
Concomitant to stringent yield predictability and reproducibility requirements, the design's bizarre yields meant that as a primary, RACER did not furnish the proper quantity and strength of x-rays and neutrons to implode and initiate respectively the secondary stage. Both x-ray and neutron fluxes were products of the fission process and the degree of fission in the RACER cores varied unpredictably as shown by the yield variability.: 317 The unpredictable neutron flux had a catastrophic impact to the TX-22 program, as the MORGENSTERN prototype fizzled and its sister project RAMROD was canceled due to the poor performance of RACER IV.: 318
- Hansen, Chuck (1995). Swords of Armageddon. Vol. IV. Retrieved 2016-12-28.
- Hansen, Chuck (1995). Swords of Armageddon. Vol. III. Retrieved 2016-12-28.
- "The Nuclear Weapon Archive - A Guide to Nuclear Weapons". Retrieved 23 September 2017.
- Hansen, Chuck (1995). Swords of Armageddon. Vol. II. Retrieved 2016-12-28.
- United States Nuclear Weapons. Globalsecurity.org. Retrieved on 2018-02-08.