Jour Fixe

kHz, DF, SS, WFP, NJ, PG, FW

General

Windows 10 Upgrade TBD soon!

Buy 4 SSDs (Xabbu3, MgControl, Wavemeter, Reslab)

Install Win10 + “Only programs you need” freshly on new SSD

Disconnect old SSDs (keep as backup)

Disconnect (Data) HDDs

Will this cause the RAID to die?

Will RAID work after that by just re-pluggin the drives?

Make backups and/or check, if automatic backups are present and in the latest state

Journal Club

NJ will not volounteer for the next one → Next in line would be SS (least amount of JCs: 2)

Holidays

NJ	Back [2019-12-30 Mo]
DF	[2019-12-20 Fr] - [2020-01-06 Mo]
SS	[2019-12-20 Fr] - [2020-01-07 Di]
WFP	[2019-12-19 Do] - [2020-01-06 Mo]
kHz	[2019-12-18 Mi] - [2020-01-06 Mo]

Resonator

Got OK for Comb repair + New PCF

TBD: Wirtschaftlichkeitsuntersuchung

Maser: Ionpump problems → Move to PTB over XMas

HITec caddy possible → kHz will ask Tobias for Monday/Tuesday ([2019-12-16 Mo]/[2019-12-17 Di])

10 MHz: Warmup behaviour investigation this week

R1: Lock showed 50 Hz/ 100 Hz oscillations two weeks ago → Rf amplifier or PSU? → Problem now gone.

R2

We see modes now!

Needs a PDH to work on for a few weeks to make it finally working again after all those years&#x2026;

SS to skip PTB work for a few weeks to invest full-time on R2?

Ask EMR next week, if SS shall do it or not

H-Beast

Changed experimental place (Because of SS's leg)

Chamber closed (not yet pumped) to mitigate acustics via air

Remeasure vibration sensitivity

Mg

Systematics

Clock AC-Stark	E-17
Densitiy	E-16
Lattice AC-Stark	E-15

* SWAP during broken-comb time (within DP)

Mostly seen heating&#x2026;

Reason due to restricted velocitiy classes in the DP?

New student (Nishad, opt. technology) going to work on that

Exp. and Theory

Quenchlaser

Mode matching improved

Temp. of laser housing was bad (was PID-Peltier, now Thorlabs). Still oscillations seen, which cause modejumps

Polarization changes infront of transfer cavity seen.

Definitely not infront of first fiber

Check, if its directly after the first/second/third fiber