 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 2 | 1/1 | 返回列表 |
| 查看: 547 | 回復(fù): 1 | ||
moskvich金蟲 (小有名氣)
|
[求助]
求教：about electron bunch/bunching的釋義
|
|
在翻譯一些材料，里面涉及電子加速器物理學(xué)，出現(xiàn)了大量electron bunch/bunching字眼，甚至有electron beam bunches這樣的字樣，不知道這個(gè)bunch什么意思，與beam怎么區(qū)分，自己理解應(yīng)該是一段一段的電子束，相當(dāng)于電子束脈沖，但是標(biāo)準(zhǔn)的譯文應(yīng)該是怎樣的呢？（順便問一下，經(jīng)常聽說一個(gè)“電子注”的叫法，是什么意思，查不到。） 加速器物理領(lǐng)域中“form factor”（如第5例中）應(yīng)該譯作什么？成型系數(shù)？ A very useful application of S-P radiation is as a diagnostic tool for the study of high-energy electron beam bunches, typically 1–10 ps long with a bunch spacing of a few ns. If a blazed diffraction grating (Sect. 6.2) is placed adjacent to the electron beam, SP signals are emitted over a wide angular spread. By studying this angular spread and the power emitted, both the length and shape of the electron bunch can be obtained. Thismethod for the study of electron beams has proved to be very versatile and has been employed over beam energies from 2 MeV up to 28.5GeV [114]. Although the accelerating voltages in gyrotrons are comparatively low, typically 10–100kV, this increase in electron mass is sufficient to produce instabilities. As the electrons travel toward the resonant cavity into an increasing magnetic field, the electron orbital momentum increases. The relativistic electrons are initially randomly distributed in their cyclotron orbits but phase bunching occurs due to the mass change of the electrons. This can be understood by realizing that electrons which lose energy to the electromagnetic field become lighter and build up a phase lead while those that gain energy have a phase lag. Both groups of electrons tend toward an equilibrium phase and with sufficient bunching of the electrons they radiate coherently.When the wave frequency is slightly greater than the cyclotron frequency, a large percentage of the electron beam energy is converted to electromagnetic radiation. ……Considering the large number of electrons in a bunch (typically 10^10), the intensity gain for CSR is huge.…… ……This is one for a point-like source with full coherence, and zero in the incoherent case of a long bunch.…… ……The form factor is given by the modulus squared of the Fourier-transform of the longitudinal charge density n.z/ of the bunch…… ……CSR was experimentally discovered using electron bunches in a linear particle accelerator (linac)…… ……Up to 400 electron bunches, each with up to 10^10 electrons, can be stored…… ……In this case, the bursting threshold was at about 10A per bunch.…… |
回復(fù)此樓» 猜你喜歡
求調(diào)劑
已經(jīng)有5人回復(fù)
-
材料工程專碩 348分求調(diào)劑
已經(jīng)有5人回復(fù)
-
一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑
已經(jīng)有3人回復(fù)
-
322求調(diào)劑
已經(jīng)有3人回復(fù)
-
0703化學(xué)調(diào)劑
已經(jīng)有4人回復(fù)
-
化學(xué)調(diào)劑
已經(jīng)有4人回復(fù)
-
297求調(diào)劑
已經(jīng)有3人回復(fù)
-
生物學(xué)調(diào)劑
已經(jīng)有3人回復(fù)
-
工科0856求調(diào)劑
已經(jīng)有3人回復(fù)
-
求調(diào)劑
已經(jīng)有3人回復(fù)
» 本主題相關(guān)商家推薦: (我也要在這里推廣)
moskvich
金蟲 (小有名氣)
- 應(yīng)助: 6 (幼兒園)
- 金幣: 5275.8
- 散金: 10
- 紅花: 2
- 帖子: 110
- 在線: 104小時(shí)
- 蟲號(hào): 2442996
- 注冊(cè): 2013-04-30
- 專業(yè): 紅外物理與技術(shù)
2樓2014-04-02 17:38:03
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 moskvich 的主題更新
| 2 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 初試 317 +6 | 半拉月丙 2026-03-20 | 6/300 |
|
|---|---|---|---|---|
|
|
[考研] 材料求調(diào)劑 +3 | @taotao 2026-03-21 | 3/150 |
|
|
|
[考研] 0703化學(xué)297求調(diào)劑 +3 | Daisy☆ 2026-03-20 | 3/150 |
|
|
[考研] 一志愿重慶大學(xué)085700資源與環(huán)境總分308求調(diào)劑 +7 | 墨墨漠 2026-03-20 | 7/350 |
|
|
|
[考研] 330求調(diào)劑0854 +3 | assdll 2026-03-21 | 3/150 |
|
|
|
[考研] 求調(diào)劑 +6 | Mqqqqqq 2026-03-19 | 6/300 |
|
|
|
[考研] 一志愿山大07化學(xué) 332分 四六級(jí)已過 本科山東雙非 求調(diào)劑！ +3 | 不想理你 2026-03-16 | 3/150 |
|
|
|
[考研] 機(jī)械專碩299求調(diào)劑至材料 +3 | kkcoco25 2026-03-16 | 4/200 |
|
|
|
[考研] 303求調(diào)劑 +5 | 睿08 2026-03-17 | 7/350 |
|
|
|
[考研] 332求調(diào)劑 +4 | ydfyh 2026-03-17 | 4/200 |
|
|
|
[考研] 華東師范大學(xué)-071000生物學(xué)-293分-求調(diào)劑 +3 | 研究生何瑤明 2026-03-18 | 3/150 |
|
|
|
[考研] 一志愿中南化學(xué)（0703）總分337求調(diào)劑 +8 | niko- 2026-03-19 | 9/450 |
|
|
|
[考研] 北科281學(xué)碩材料求調(diào)劑 +5 | tcxiaoxx 2026-03-20 | 5/250 |
|
|
|
[考研] 289求調(diào)劑 +6 | 懷瑾握瑜l 2026-03-20 | 6/300 |
|
|
|
[考研] 一志愿西安交通大學(xué) 學(xué)碩 354求調(diào)劑211或者雙一流 +3 | 我想要讀研究生 2026-03-20 | 3/150 |
|
|
|
[考研] 353求調(diào)劑 +3 | 拉鉤不許變 2026-03-20 | 3/150 |
|
|
|
[考博] 招收博士1-2人 +3 | QGZDSYS 2026-03-18 | 3/150 |
|
|
|
[考研] 266求調(diào)劑 +5 | 陽(yáng)陽(yáng)哇塞 2026-03-14 | 10/500 |
|
|
|
[考研] 材料專碩306英一數(shù)二 +10 | z1z2z3879 2026-03-16 | 13/650 |
|
|
|
[考研] [導(dǎo)師推薦]西南科技大學(xué)國(guó)防/材料導(dǎo)師推薦 +3 | 尖角小荷 2026-03-16 | 6/300 |
|