Table 1 Electron beam parameters of the THz experimental sessions. The asterisc (*) means “at the linac end”.

Bunch Charge

0.7

nC

Initial Bunch Duration

2.8

ps

Mean Energy*

1308

871

MeV

Hor. Norm. Emittance*

2.1

1.8

µm

Vert. Norm. Emittance*

1.7

1.5

µm

Compression Factor*

8

8, 11

Bunch Duration*

0.35

0.35, 0.25

ps

Peak Current*

560

560, 750

A

Transverse Sizes at the Al target

<0.5 (x), <0.2 (y)

mm

R₅₆ of the dump line

5, 19

37

mm