Table 2.

CLEAR machine parameters, where: ${ϵ}_{g,y}$ is the beam geometrical emittance; ${\beta }_y$ and ${\alpha }_y$ are the Twiss parameters at the entrance of the RFD; $L_a$, $L_b$, and $L_q$ correspond to the lengths shown in Fig. 3.

Parameters	Range
Energy (MeV)	60–220
Bunch charge (pC)	5–2000
Bunch length (ps)	0.2–5
${ϵ}_{g_{\mathit{xy}}}$ (nm)	1–20
${\beta }_{x,y}$ (m)	1–100
${\alpha }_{x,y}$	$-$7 to 7
Repetition rate (Hz)	1–10
Number of bunches in train	1–150
Bunch spacing (GHz)	1.5
$L_a$ (m)	0.800
$L_b$ (m)	1.20
$L_q$ (m)	0.226