Workers: Miyo-san, Simon

We tested the basic coherence between the heaters and the temperature sensors by injecting some power into the heater system.

• Measured restistance of the whole system is 32.5Ohm; 24.8Ohm are from the heaters (placed in parallel)
• We injected first 1.27W power (6.35V and 0.2A) and discovered a slight increase of the temperature
  • approx. 0.1-0.2K after 25 minutes for all sensors on the baffle
  • approx. 0.02K for the sensor on the translator-stage
• We then increased the power to 4W (11.4V and 0.35A); the effect on the sensors increased too:
  • approx. 0.3K after 30 minutes for the baffle sensors
  • approx. 0.04K for the translator-stage sensor
• Considering the heater's restistance, we think that we injected 75% of the power into the heaters itself (3W instead of 4W)
• According to Obuchi-san's calculations, we can expect an increase of the temperature of approx. 0.9K after 30 minutes with 3W heating. Instaed, we reach only 30% of this calculated efficiency
• A possible reason for this inconstistency may be the surrounding air, cooling down the place around the sensors...