# Monday 11/06/2018: seeder size status before neoVAN insestigation with neoLASE engineer

• we set the neoVAN seeder size to 131 um, located @ ~ 6 cm upstream the neoVAN input side

it should be compliant with the nominal setting from the datasheet: 130 um at  5 cm (see attached pdf doc) .

• Slave-to-neoVAN telescope tuning:

we set the distance between LB-L4 and LB_L5  to 33.1 mm (lens center -to-lens center)
dis(LB_M5'-LB_L4) = 380 mm, dist(WP5-M5') = 535 + 270 mm
the beam profile measurement of the seeder is stored into 180611_SlaveTelescope_BeamProfile_r.txt, (see also plot). The profile of the seeder is got in transmission of LB_M6 mirror
--> that is 131 um at 55 cm from LB_L5 (from propagation measurement) and 6 cm before the neoVAN input side ( we set dist(LB_L5,neoVAN) to 61 cm)