A 30MeV RF electron linac-based neutron source will be set up by APPD, BARC at IGCAR, Kalpakkam, India. This facility will include neutron activation of sodium by photo neutrons for FBR shielding studies and Time of Flight (n-TOF) facility for various research applications. The n-TOF facility consists of electron gun that will generate 10 ns electron beam. It will be accelerated to 30 MeV by RF linear accelerator. The electron pulse at the exit of the linac will have 40% energy spread. A compression magnet is designed to compress 10 ns, 10A electron pulse to 1 ns, 100 A.A 360°, 5-sector, zero gradient magnet having rectangular yoke of size 3.2;m × 2.7m × 0.4m and weight of ~24 Ton gives pulse compression ratio of 10:1 at a magnetic field of 0.1 T.In order to get the same compression ratio with reduced magnet size, a 720°, 9-sector magnet having zero magnetic field gradient is designed. A magnet will have five physical sectors through which an electron beam will rotate twice. The analytical solution and CST Particle Studio simulation results are presented. To get 10:1 compression ratio, ~0.15 T magnetic field will be required and overall magnet size will be reduced to 2.1;m × 2.1m ×  0.4 m.