A normal conducting accelerator for a muon collider demonstration machine

We present a 250 GeV linac arrangement using normal conducting cavities that could be used for a muon collider demonstration machine. One scenario consists of six 200 MHz linacs and rapid cycling pulsed magnets to be installed in a tunnel with six straight sections. The RF parameters of the cavities are given. Another scenario consists of 800 MHz. Also addressed is the possibility of using normal conducting cavities with liquid nitrogen cooling, which has several advantages.