Name (Lab) Presentation title (Place, date) 1 IN2P3 Les deux infinis

Optical cavity Revue ThomX mécanique(25/01/2011)

Optical cavityOptical cavity

Yann Peinaud & Mickael Lacroix (LAL)

peinaud@lal.in2p3.fr & lacroix@lal.in2p3.fr

Name (Lab) Presentation title (Place, date) 2 IN2P3 Les deux infinis

Optical cavity

Synoptic & Constraints

Solutions Motorized table, bumpers / Optical table

Vacuum chamber

Mirror adjustment system

Actuator capsule

Optical chamber

Dîpole chamber

X-ray output

Vacuum load compensation system

Positioning strategy

Not studied yet

Summary

Name (Lab) Presentation title (Place, date) 3 IN2P3 Les deux infinis

Optical cavity

Synoptic and constraints

Flat mirror 1( θx, θy, z )

Flat mirror 2 ( θx, θy, z )

Spherical mirror 1( θx, θy, z )

Spherical mirror 2( θx, θy, z )

x

y

z

Waist

e- beam

Synoptic Constraints Micro positioning of the Waist (+/-10µm on X and Y)

Stability of the positioning

“No vibration”

No misalignment (No load variation)

Vacuum

Low out-gasing materials

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

Lowest interaction angle

40mrad of Compton X-ray output

Lowest e- beam perturbation

2100 mm

Name (Lab) Presentation title (Place, date) 4 IN2P3 Les deux infinis

Optical cavity

Motorized table, bumpers and optical table

Bumpers

Constraints: Micro positioning of the Waist (+/-10µm on X and Y)

Stability of the positioning

“No vibration”x

y

z

X motion

Y motion

3 feets with X&Y micro motions + bumpers between the 2 tables

(used by Mightylaser at KEK)

Name (Lab) Presentation title (Place, date) 5 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber

Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Ring chambers

Ring dipoles

Optical chambers

Name (Lab) Presentation title (Place, date) 6 IN2P3 Les deux infinis

Optical cavity

ThomXMightyLaser (R.Cizeron)

Z motion balls (2 on « v » tracks and 1

on flat track)

Vacuum chamber Mirror adjustment system

Parameters MightyLaser ThomX

Max length between mirors (mm) 500 2100

Minimum incremental motion (µm) 0,3 0,1

Minimum incremental motion used (µm) 1 0,1

Arm length (mm) 110 60

Laser spot precision on the furthest miror (µm) 1,36 3,5

Laser spot precision used on the furthest miror (µm) 4,55 3,5

θx, θy motion with a cardan solution (flexure hinges)

Vacuum prepared actuators

Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

40mrad of Compton X-ray output

Name (Lab) Presentation title (Place, date) 7 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber Actuator capsule

Micro-actuator

CF16 flanges

Sub-C ceramic plug

Spring

Baking tests are planned

Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

Name (Lab) Presentation title (Place, date) 8 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber Piezo

Sub-C ceramic plug

Not possible

Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

High out gasing material

Is it really needed in ThomX?

Is the electron repetition frequency adjusted on the length of the optical cavity?

If it’s the case what will be the range?

Name (Lab) Presentation title (Place, date) 9 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber Optical chamber

Thick base (40mm) to minimize deformations due to the vacuum

Thick socket on 3 feets (with precise positioning)

Constraints: Stability of the positioning

No misalignment (No load variation)

Vacuum

Low out-gasing materials

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

Name (Lab) Presentation title (Place, date) 10 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber Dipole chamber

e-

e-

Pumping portSlits for laser and X-ray :

- R3 x 27mm

- R4.5 x 45mm

BPM Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Lowest interaction angle

40mrad of Compton X-ray output

Lowest e- beam perturbation

40 mrad X-ray

Name (Lab) Presentation title (Place, date) 11 IN2P3 Les deux infinis

Optical cavity

Vacuum chamber X-ray output

Cavity diagnostic (CfF40 window)

Laser injection (CF 40 window)

40 mrad X-ray (CF63 beryllium

window)

Tests are planned to place the injection on the opposite side of the

X-ray

Constraints: Vacuum

Low out-gasing materials

Baking at 150°C

Lowest interaction angle

40mrad of Compton X-ray output

Name (Lab) Presentation title (Place, date) 12 IN2P3 Les deux infinis

Optical cavity

compensation system

Bellow for dilatation

BPM support

(still under study)

pad

Translation of 2 mm due to baking at 150°C

Vacuum load compensation system

Constraints: Stability of the positioning

No misalignment (No load variation)

Vacuum

Baking at 150°C

Micro positioning of the mirrors ( θx, θy, z )

Bellows for compensation

Name (Lab) Presentation title (Place, date) 13 IN2P3 Les deux infinis

Optical cavity

Positioning fingers

Positioning strategy

Name (Lab) Presentation title (Place, date) 14 IN2P3 Les deux infinis

Optical cavity

Not studied yet

The full integration between cavity and ring

Accoustic isolation & thermalisation (Mightylaser baseline)

Cleanness conservation (Mightylaser baseline)

Name (Lab) Presentation title (Place, date) 15 IN2P3 Les deux infinis

Optical cavity

• Back slides

Name (Lab) Presentation title (Place, date) 16 IN2P3 Les deux infinis

Optical cavityCavité optique

Intégration sur l’anneau

Propriétés :

Angle d’intéraction de 2°

Bon accès aux miroirs

Ne nécessite pas de place dans l’anneau

Name (Lab) Presentation title (Place, date) 17 IN2P3 Les deux infinis

Optical cavity

Synoptique de la cavité optique 4 miroirs

Alignement

θx, θy pour chacun des miroirs

Focalisation (taille du waist)

Z sphérique 1 et 2

Longueur de cavité (fréquence de résonnance)

Z plan 1 et 2

Miroir plan 1( θx, θy, z )

Miroir plan 2 ( θx, θy, z )

Miroir sphérique 1( θx, θy, z )

Miroir sphérique 2( θx, θy, z )x

y

z

Waist

e- beam

Synoptic

Constraints

Waist micro transversal positioning (+/-10µm)

Micro positioning of the mirrors

θx, θy on each mirrors

Z on spherical mir

Stability of the positioning

“No vibration”

Mirrors alignment under air

UHV

Materials

Atmosphere pressure

baking at 150°C

Name (Lab) Presentation title (Place, date) 18 IN2P3 Les deux infinis

Optical cavity

Dipôle BPMVanne

Pompe ionique

Chambre miroirs

Table optique

Chambre dîpole

xy

z

Table motorisée en

X et Y

Soufflet :- Isolation

- Mvt transverse (table X,Y)

- Mvt longitudinal (étuvage)

Intégration sur l’anneau

Name (Lab) Presentation title (Place, date) 19 IN2P3 Les deux infinis

Optical cavity

Not studied yet

The full integration between cavity and ring

Accoustic isolation & thermalisation (Mightylaser baseline)

Cleanness conservation (Mightylaser baseline)