Spectroscopic measurements of plasma emission light for plasma-based acceleration experiments

被引：16

作者：

Filippi, F. ^{[1
,2
]}

Anania, M. P. ^{[3
]}

Biagioni, A. ^{[3
]}

Chiadroni, E. ^{[3
]}

Cianchi, A. ^{[4
]}

Ferrario, M. ^{[3
]}

Mostacci, A. ^{[1
,2
]}

Palumbo, L. ^{[1
,2
]}

Zigler, A. ^{[5
]}

机构：

[1] Sapienza Univ Roma, Dipartimento Sci Base & Applicate Ingn SBAI, Via A Scarpa 14-16, I-00161 Rome, Italy

[2] INFN Roma1, Piazzale Aldo Moro 2, Rome 00161, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, Frascati 00044, Italy

[4] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

[5] Hebrew Univ Jerusalem, IL-91904 Jerusalem, Israel

来源：

JOURNAL OF INSTRUMENTATION | 2016年 / 11卷

关键词：

Plasma diagnostics - interferometry; spectroscopy and imaging; Wake-field acceleration (laser-driven; electron-driven); SPARC-LAB;

D O I：

10.1088/1748-0221/11/09/C09015

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Advanced particle accelerators are based on the excitation of large amplitude plasma waves driven by either electron or laser beams. Future experiments scheduled at the SPARC_LAB test facility aim to demonstrate the acceleration of high brightness electron beams through the so-called resonant Plasma Wakefield Acceleration scheme in which a train of electron bunches (drivers) resonantly excites wakefields into a preformed hydrogen plasma; the last bunch (witness) injected at the proper accelerating phase gains energy from the wake. The quality of the accelerated beam depends strongly on plasma density and its distribution along the acceleration length. The measurements of plasma density of the order of 10(16)-10(17) cm(-3) can be performed with spectroscopic measurements of the plasma-emitted light. The measured density distribution for hydrogen filled capillary discharge with both Balmer alpha and Balmer beta lines and shot-to-shot variation are here reported.

引用

页数：8

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