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Message ID: 39     Entry time: Thu Jun 17 17:12:41 2021
 Author: Entered by bruni from 82.64.20.144 on Thu Jun 17 17:11:20 2021 
 Status: Under Process 
 Type: Problem 
 Category: RF D1 
 Important:
 Subject: mesure bas niveau canon RF 
 Icon:  

- Mesure bas niveau du canon sous vide et thermalisation
À 30 degrés : fréquence d’accord à 3.0023617 GHz au lieu de 2.99855 GHz
A 40 degrés : fréquence d’accord à 3.0018623 GHz au lieu de 2.99855 GHz
La structure semble avoir subit un rétrécissement
Pas rattrapable avec la température dans une gamme acceptable
- La cathode est insérée en position fixe, la reproductibilité avait été vérifiée au préalable
- Jean-Noel, et Alexandre déconseillent fortement l'utilisation d'un endoscope qui risqueraient d'endommager les surfaces et d'introduire de la matière dans le canon.
- Nourredine conseille un démontage et une mesure à la bille en salle RF pour diagnostiquer le canon
- Il a été décidé d'effectuer une étape intermédiaire de mesure bas niveau avec le canon en place --> Alexandre coordonne l'intervention
    - Mise sous azote du canon, démontage fenêtre, coudes
    - Mesure de la fenêtre, du coupleur de mesure
    - Mesure bas niveau du canon en transmission et réflexion
    - Discussion des résultats
- Il a été décidé de poursuivre le conditionnement de la section pour le 28 juin
        - Prêt d’une charge 20MW par PHIL pour montage sur la branche RF canon
        - Remise en SF6
        - Poursuite du conditionnement section LIL le 28 juin

Attachment 1: Canon-ThomX_40°.png  14 kB  Uploaded Thu Jun 17 18:14:11 2021  | Hide | Hide all | Show all
Canon-ThomX_40°.png
Attachment 2: Canon-ThomX_30°_DELTA.png  14 kB  Uploaded Thu Jun 17 18:14:45 2021  | Show | Hide all | Show all
Attachment 3: Canon-ThomX_30°.png  14 kB  Uploaded Thu Jun 17 18:14:59 2021  | Hide | Hide all | Show all
Canon-ThomX_30°.png
Attachment 4: Canon-ThomX_40°.csv  120 kB  Uploaded Thu Jun 17 18:15:30 2021  | Hide | Hide all | Show all
! FILETYPE CSV
! VERSION 1.0,1
! TIMESTAMP Thursday, 17 June 2021 00:38:00
! TIMEZONE (GMT-08:00) Pacific Time (US & Canada)
! NAME Agilent Technologies
! MODEL N9923A
! SERIAL MY52412336
! FIRMWARE_VERSION A.07.52
! GPS_LATITUDE 
! GPS_LONGITUDE 
! GPS_TIMESTAMP 0001-01-01 00:00:00Z
! GPS_SECS_SINCE_LAST_READ 0
! CHECKSUM 2037028642
! CORRECTION1 ON U*
! DATA Freq,S11
! FREQ UNIT Hz
! DATA UNIT dB
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Attachment 5: Canon-ThomX_30°.csv  120 kB  Uploaded Thu Jun 17 18:15:49 2021  | Show | Hide all | Show all
ELOG V3.1.4-395e101