Table 1 Overview of experimental runs

From: Increased ionization supports growth of aerosols into cloud condensation nuclei

Exp.a

P b

N c

Scan ranged

UVe

RHf

CPCg

Leadh

—

h

#

nm

%

%

Model

cm

V1*

4

23

3.5–118

80

14

3775

0

V2*

4

97

2–63.8

70

23

3776

0

V3*

8

16

2–63.8

70

23

3776

0

V4*

4

77

2–63.8

50

23

3776

0

V5*

8

44

2–63.8

40

15

3775

0

V6

8

22

2–63.8

35

21

3775

0

V7

8

4

4.0–20.2

35

37

3775

0

V8

8

12

4.0–20.2

25

38

3775

0

V9

8

45

4.0–20.2

15

38

3775

0

V10

8

47

4.0–20.2

15

38

3775

1

V11

8

99

4.0–20.2

25

37

3775

1

  1. aShows the name of the experiment, used for reference. An asterisk (*) next to the name indicates that sulfuric acid was measured during the experiment
  2. bLength of the period (P) where a P of 4 h means that the experiment had 2 h of γ-rays on and 2 h of γ-rays off
  3. cNumber of repetitions (periods) of the experiment
  4. dScan range of the DMA, which was narrowed in later runs without changing the scan-time to improve counting statistics
  5. eSetting of the UV light used to produce sulfuric acid, in percentage of maximum power.
  6. fRelative humidity in the chamber
  7. gTSI model number of the CPC used
  8. hAmount of lead in front of the gamma sources during the gamma-on time
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