MONALISA Double Bellow System Forces test results Oxford

MONALISA Double Bellow System Forces test results Oxford: June 2009 Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 1

MONALISA vacuum enclosure Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 2

Double bellows system (DBS) Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 3

Test programme • Lateral spring constant • Longitudinal forces (free) • Longitudinal forces (attached to frame) Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 4

Lateral spring constant set-up Force gauge under bias tension Lateral spring constant Ambient pressure 35± 5 N/mm Inner Evacuated 35± 5 N/mm Double bellows off floor at one end Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 5

Longitudinal forces (free DBS) Force gauge under bias tension (see next slide) Double bellows upright resting on floor on one end Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 6

Longitudinal forces (free DBS) N. B. Force remains within ± 50 N Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 7

Longitudinal forces (in-situ) • We assembled parts into wooden frame – (Quadrupole end box not fitted) • Placed force sensor – on downstream face of “Shintake monitor” – measures F in (electron beam) z direction • Set up shown in next slide Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 8

Longitudinal forces (in-situ): Set-up Shintake end box Shintake top plate Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 9

Longitudinal forces (in-situ): Set-up Strain sensor (see next slide) • mounted behind Shintake monitor plate • mounted on independent block Mounting rods • removed forces test Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 10

Force sensor close-up Force sensor Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 11

Forces on Shintake end: 1 Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 12

Forces on Shintake end: 2 Wed 24 Jun 2009 ATF 2 weekly meeting Oxford MONALISA 13

Entire assembly holds vacuum g kin a e Br Wed 24 Jun 2009 s w ne ATF 2 weekly meeting Oxford MONALISA 14