Proposal to Search for a Dark Photon in Positron on Target Collisions at DAΦNE Linac

Table 1

BTF beam parameters [32]. A possible increase of the performance after an upgrade is also shown.

	𝑒^+	𝑒^−	𝑒^+Upg	𝑒^−Upg
Maximal beam energy [MeV]	550	800	800	1050
Beam rate [particles/bunch]	6.2⋅10^8	6.2⋅10^8	6⋅10^9	3.1⋅10^10
Number of bunches per second [Hz]	50	50	50	50
Max. averaged current during a bunch [mA]	10	10	100	500
Typical emittance [mm * mrad]	1.5	1.	1.5	1.
Beam spot size (𝜎) [mm]	2.	2.	2.	2.
Bunch length [ns]	10	10	40	40