July 25th, 2020

лошадь, диаграмма, Фейнман

Остро эротический текст на Элементах

https://elementy.ru/kartinka_dnya/1187/Rozovye_shishki_eli
Рекомендуется читать голосом Дроздова:))

Оказывается, те зеленые молодые шишечки, которые мы иногда собираем на варенье, оплодотворены 12-14 месяцев назад! Вообще, весь текст - просто огонь!
лошадь, диаграмма, Фейнман

Введение в оптику - коротко и вкусно

Из материалов ЦЕРНовской школы по ускорителям, которые я складирую тут. Позавчера появилось вот это:

Introduction to Optics and Lasers for Beam Instrumentation: https://arxiv.org/abs/2007.11272
Stephen Gibson
The versatility of optics enables the design of a wide range of elegant beam instrumentation. Multiple properties of particle beams can be precisely measured by various optical techniques, which include: direct sampling of optical radiation emitted from a charged particle beam; monitoring interactions with an optical probe such as a laserwire; and by electro-optic conversion of the beam signal with high-bandwidth fibre readout. Such methods are typically minimally-invasive and non-destructive, thus permitting diagnostics during accelerator operation without perturbation of the particle beam or risk of damage to the instrument. These proceedings summarise three CAS lectures that introduce the basic principles of optics relevant for instrumentation design, outline the key laser technologies and setups, and review the state-of-the-art in laser-based beam instrumentation.
Comments: 34 pages, contribution to the CAS - CERN Accelerator School: Beam Instrumentation, 2-15 June 2018, Tuusula, Finland