Spot size 23-11-2021

On this page you will find the spot size measurments performed on 23 november 2021 by Emily, Marjolein and Casimir. Spotsizes were measured by tracing the beam shape on white paper in a cardboard holder placed inside the beam. Three different tracings were measured at each distance to get a more accurate measurement.

@Casimir: what does the beam look like? You say there is a slit, is the slit square or rectangular? What are the dimensions of the slit during this measurement? Are these the numbers at the top of the table? What do these numbers mean?

Measurement table

The distance in the table is measured to the inside of the vacuum chamber. To get the distance to the slit, 94 mm needs to be added to the distance in the table. See the measurement notes at the bottom of the page for the original.

Measurements Entrance 3.05(mm) Exit 1.65 (mm)
Distance (mm)	Measurer	Horizontal (mm)	Vertical (mm)
103 ± 1	Casimir	6.8 ± 0.2	9.1 ± 0.2
	Emily	7.7 ± 0.2	9.5 ± 0.2
	Marjolein	7.7 ± 0.2	9.5 ± 0.2
	Average	7.4 ± 0.2	9.4 ± 0.2
126 ± 1	Casimir	7.5 ± 0.2	9.9 ± 0.2
	Emily	6.9 ± 0.2	10.4 ± 0.2
	Marjolein	6.5 ± 0.2	12.1 ± 0.2
	Average	7.0 ± 0.2	10.9 ± 0.2
162 ± 1	Casimir	7.0 ± 0.2	12.3 ± 0.2
	Emily	8.9 ± 0.2	12.7 ± 0.2
	Marjolein	8.1 ± 0.2	12.0 ± 0.2
	Average	8.0 ± 0.2	12.3 ± 0.2
175 ± 1	Casimir	9.1 ± 0.2	11.4 ± 0.2
	Emily	8.8 ± 0.2	11.7 ± 0.2
	Marjolein	6.8 ± 0.2	13.7 ± 0.2
	Average	8.2 ± 0.2	12.3 ± 0.2
232 ± 1	Casimir	10.9 ± 0.2	18.0 ± 0.2
	Emily	10.6 ± 0.2	15.9 ± 0.2
	Marjolein	13.7 ± 0.2	14.9 ± 0.2
	Average	11.7 ± 0.2	16.3 ± 0.2
251 ± 1	Casimir	10.8 ± 0.2	18.2 ± 0.2
	Emily	11.6 ± 0.2	15.2 ± 0.2
	Marjolein	12.8 ± 0.2	16.6 ± 0.2
	Average	11.7 ± 0.2	16.7 ± 0.2

Conclusions

@Casimir: what are your conclusions? Is the behaviour as expected?

Measurement notes