User:Tom282f3
W87 | |
---|---|
类型 | Nuclear warhead |
服役记录 | |
服役期间 | 1986–present |
使用方 | United States |
生产历史 | |
研发者 | Lawrence Livermore National Laboratory |
研发日期 | Mod 0: February 1982 Mod 1: November 1986 to July 1988, March 2019 to 2030 |
生产日期 | Mod 0: July 1986 to December 1988 Mod 1: 2030 onwards |
制造数量 | 525 |
衍生型 | 2 |
基本规格 | |
重量 | 400至600英磅(180至270公斤) |
引爆机制 | Contact, airburst |
爆炸当量 | 300 kt (W87-0) 475 kt (W87-1) |
The W87 is an American thermonuclear missile warhead formerly deployed on the LGM-118A Peacekeeper ("MX") ICBM. 50 MX missiles were built, each carrying up to 10 W87 warheads in multiple independently targetable reentry vehicles, and were deployed from 1986 to 2005. Starting in 2007, 250 of the W87 warheads from retired Peacekeeper missiles were retrofitted onto much older Minuteman III missiles, with one warhead per missile.[1]
Description
[编辑]Design of the W87 started in February 1982 at Lawrence Livermore National Laboratory and production of the warhead began in July 1986 and ended in December 1988.[2] Its design is reportedly somewhat similar to the W88, though that warhead was designed at Los Alamos National Laboratory. The weapons are part of a National Nuclear Security Administration nuclear weapons lifecycle program.[3]
The W87 design includes all modern safety features, including the insensitive high explosives LX-17 and PBX-9502 (primary component TATB), a fire-resistant pit, and advanced arming and fuzing safety features.
The original yield of the W87 was 300 kilotons, but it has the announced ability to be upgraded to a yield of 475 kilotons, presumably by using more highly enriched uranium (HEU) in the fusion secondary stage tamper. It is not known if that upgrade was completely tested and ready to implement, or merely designed.
The exact dimensions of the W87 are classified, but it fits inside the Mk. 21 reentry vehicle, which is a cone with base diameter of 22英寸(56厘米) and a length of 69英寸(180厘米). The weight is believed to be between 440和600英磅(200和270公斤).
W87 mod 1
[编辑]In addition to the higher yield upgrade option described above, a specific variant W87 mod 1 (W87-1) entered Phase 3 development engineering and was assigned its type designation in November 1988.[2] This variant was intended for the MGM-134 Midgetman small ICBM missile and was intended to have the full 475 kiloton yield. The W87-1 had a planned first production unit date of July 1997,[4] but Midgetman and W87-1 were canceled in January 1992.
In 2019, the W87 mod 1 was selected to replace the W78 warhead deployed on all Minuteman III missiles not currently carrying the W87 mod 0. The new warhead will not be deployed onto Minuteman III, but instead be deployed on Minuteman III's replacement ICBM system Ground Based Strategic Deterrent (GBSD). It is not clear if the new W87 mod 1 program is a continuation of the previous W87 mod 1 program, or if it uses any of the physics package developed in the previous W87 mod 1 program.[5]
Information released by the Department of Energy on the program states that it "has a similar primary design to the W87-0", which could be evidence that it is like the previous W87 mod 1 program in that it has a different or modified secondary to produce a higher yield.[5] The DoE states that the weapon is based on previously tested nuclear components, with a primary stage containing insensitive high explosives and advanced safety features, but that the weapon does not prove any new military capabilities.[6]
Phase 6.2 Feasibility Study was halted in 2014 before being restarted in 2019. Phase 6.3 Development Engineering is planned to begin July 2022, with 6.4 Production Engineering planned for mid 2026 and 6.5 Initial Production planned for 2030.[6]
It is planned for GBSD to deploy in 2028, with W87-0 warheads initially being fitted to the system and W87-1 warheads being fitted from 2030 onward. This affords the air force a small amount of flexibility if the W87-1 is delayed.[7]
See also
[编辑]References
[编辑]- ^ Kristensen, Hans M.; Norris, Robert S. US nuclear forces, 2015. Bulletin of the Atomic Scientists. January 18, 2015, 71 (2): 107–119. Bibcode:2015BuAtS..71b.107K. S2CID 145260117. doi:10.1177/0096340215571913.
- ^ 2.0 2.1 Nuclear weapons labs (status report), University of California, 1989 [2006-04-15], (原始内容存档于2006-05-18).
- ^ Fact Sheet: W87-1 Modification Program (PDF). National Nuclear Security Administration. March 2019 [2020-03-07]. (原始内容存档 (PDF)于2019-12-31).
- ^ Terry Michael Josserand. R&A for UUR_Weapon_History_Phases_20170206. (报告). Sandia National Labs. 1 March 2017 [30 August 2021]. OSTI 1429158. (原始内容存档于30 August 2021).
- ^ 5.0 5.1 W87-1 Modification Program (PDF). March 2019 [2020-03-08]. (原始内容存档 (PDF)于2019-12-31).
- ^ 6.0 6.1 National Nuclear Security Administration. W87-1 MODIFICATION PROGRAM (PDF) (报告). 1 Feb 2022 [30 March 2022]. (原始内容存档 (PDF)于30 March 2022).
- ^ Frank G. Klotz, Alexandra T. Evans. Modernizing the U.S. Nuclear Triad: The Rationale for a New Intercontinental Ballistic Missile (PDF) (报告). RAND: 21. 2022 [30 March 2022]. (原始内容存档 (PDF)于6 February 2022).
External links
[编辑]Template:United States nuclear devices
工具箱
[编辑]
工具箱 |
下列各项的文字格式及显示效果都在模板消息列表中,請点击展開
管理工具 (以下带*号者,请加签名~~~~作结)
|
编辑条目工具
| |